20355864357 has 8 divisors (see below), whose sum is σ = 27546244576. Its totient is φ = 13368030192.

The previous prime is 20355864337. The next prime is 20355864407. The reversal of 20355864357 is 75346855302.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20355864357 - 2⁷ = 20355864229 is a prime.

It is a super-2 number, since 2×20355864357² (a number of 21 digits) contains 22 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 (20355864307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50636278 + ... + 50636679.

It is an arithmetic number, because the mean of its divisors is an integer number (3443280572).

Almost surely, 2^20355864357 is an apocalyptic number.

It is an amenable number.

20355864357 is a deficient number, since it is larger than the sum of its proper divisors (7190380219).

20355864357 is a wasteful number, since it uses less digits than its factorization.

20355864357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101273027.

The product of its (nonzero) digits is 3024000, while the sum is 48.

The spelling of 20355864357 in words is "twenty billion, three hundred fifty-five million, eight hundred sixty-four thousand, three hundred fifty-seven".