20597496357 has 4 divisors (see below), whose sum is σ = 27463328480. Its totient is φ = 13731664236.

The previous prime is 20597496329. The next prime is 20597496389. The reversal of 20597496357 is 75369479502.

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 not a de Polignac number, because 20597496357 - 2¹⁸ = 20597234213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20597496297 and 20597496306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20597446357) 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, 3432916057 + ... + 3432916062.

It is an arithmetic number, because the mean of its divisors is an integer number (6865832120).

Almost surely, 2^20597496357 is an apocalyptic number.

It is an amenable number.

20597496357 is a deficient number, since it is larger than the sum of its proper divisors (6865832123).

20597496357 is an equidigital number, since it uses as much as digits as its factorization.

20597496357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6865832122.

The product of its (nonzero) digits is 14288400, while the sum is 57.

The spelling of 20597496357 in words is "twenty billion, five hundred ninety-seven million, four hundred ninety-six thousand, three hundred fifty-seven".