20713445893 has 4 divisors (see below), whose sum is σ = 23672509600. Its totient is φ = 17754382188.

The previous prime is 20713445867. The next prime is 20713445917. The reversal of 20713445893 is 39854431702.

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 20713445893 - 2¹⁷ = 20713314821 is a prime.

It is a super-3 number, since 3×20713445893³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20713445393) 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, 1479531843 + ... + 1479531856.

It is an arithmetic number, because the mean of its divisors is an integer number (5918127400).

Almost surely, 2^20713445893 is an apocalyptic number.

It is an amenable number.

20713445893 is a deficient number, since it is larger than the sum of its proper divisors (2959063707).

20713445893 is an equidigital number, since it uses as much as digits as its factorization.

20713445893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2959063706.

The product of its (nonzero) digits is 725760, while the sum is 46.

The spelling of 20713445893 in words is "twenty billion, seven hundred thirteen million, four hundred forty-five thousand, eight hundred ninety-three".