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20982040897 = 50341713799
BaseRepresentation
bin10011100010101000…
…001000100101000001
32000011021102010002211
4103202220020211001
5320432400302042
613350005542121
71341645255616
oct234250104501
960137363084
1020982040897
1189978a6974
124096a14941
131c94c9761c
1410308ba50d
1582c0a1017
hex4e2a08941

20982040897 has 4 divisors (see below), whose sum is σ = 21023755200. Its totient is φ = 20940326596.

The previous prime is 20982040867. The next prime is 20982040969. The reversal of 20982040897 is 79804028902.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20982040897 - 223 = 20973652289 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20982040897.

It is not an unprimeable number, because it can be changed into a prime (20982040867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20856397 + ... + 20857402.

It is an arithmetic number, because the mean of its divisors is an integer number (5255938800).

Almost surely, 220982040897 is an apocalyptic number.

It is an amenable number.

20982040897 is a deficient number, since it is larger than the sum of its proper divisors (41714303).

20982040897 is an equidigital number, since it uses as much as digits as its factorization.

20982040897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41714302.

The product of its (nonzero) digits is 580608, while the sum is 49.

The spelling of 20982040897 in words is "twenty billion, nine hundred eighty-two million, forty thousand, eight hundred ninety-seven".

Divisors: 1 503 41713799 20982040897