20451002213056 has 56 divisors (see below), whose sum is σ = 42201653610240. Its totient is φ = 9821206886400.

The previous prime is 20451002213053. The next prime is 20451002213069. The reversal of 20451002213056 is 65031220015402.

It is not an unprimeable number, because it can be changed into a prime (20451002213053) 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, 28490685 + ... + 29199676.

Almost surely, 2^{20451002213056} is an apocalyptic number.

It is an amenable number.

20451002213056 is an abundant number, since it is smaller than the sum of its proper divisors (21750651397184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20451002213056 is a wasteful number, since it uses less digits than its factorization.

20451002213056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57690593 (or 57690583 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 20451002213056 its reverse (65031220015402), we get a palindrome (85482222228458).

The spelling of 20451002213056 in words is "twenty trillion, four hundred fifty-one billion, two million, two hundred thirteen thousand, fifty-six".