20355316230664 has 16 divisors (see below), whose sum is σ = 38167310074320. Its totient is φ = 10177366877520.

The previous prime is 20355316230649. The next prime is 20355316230673. The reversal of 20355316230664 is 46603261355302.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36107542 + ... + 36666949.

It is an arithmetic number, because the mean of its divisors is an integer number (2385456879645).

Almost surely, 2^{20355316230664} is an apocalyptic number.

It is an amenable number.

20355316230664 is a deficient number, since it is larger than the sum of its proper divisors (17811993843656).

20355316230664 is a wasteful number, since it uses less digits than its factorization.

20355316230664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72809460 (or 72809456 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 46.

Adding to 20355316230664 its reverse (46603261355302), we get a palindrome (66958577585966).

The spelling of 20355316230664 in words is "twenty trillion, three hundred fifty-five billion, three hundred sixteen million, two hundred thirty thousand, six hundred sixty-four".