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20101321013 = 34757928879
BaseRepresentation
bin10010101110001000…
…011101000100110101
31220212220011220112212
4102232020131010311
5312131414233023
613122345023205
71311062260304
oct225610350465
956786156485
1020101321013
118585742aa4
123a8ba84b05
131b846917b7
14d8993c43b
157c9ad1e78
hex4ae21d135

20101321013 has 4 divisors (see below), whose sum is σ = 20159250240. Its totient is φ = 20043391788.

The previous prime is 20101320977. The next prime is 20101321091. The reversal of 20101321013 is 31012310102.

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 20101321013 - 26 = 20101320949 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101321213) 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, 28964093 + ... + 28964786.

It is an arithmetic number, because the mean of its divisors is an integer number (5039812560).

Almost surely, 220101321013 is an apocalyptic number.

It is an amenable number.

20101321013 is a deficient number, since it is larger than the sum of its proper divisors (57929227).

20101321013 is an equidigital number, since it uses as much as digits as its factorization.

20101321013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57929226.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 20101321013 its reverse (31012310102), we get a palindrome (51113631115).

The spelling of 20101321013 in words is "twenty billion, one hundred one million, three hundred twenty-one thousand, thirteen".

Divisors: 1 347 57928879 20101321013