21413245054056 has 32 divisors (see below), whose sum is σ = 53533226009760. Its totient is φ = 7137733234752.

The previous prime is 21413245054037. The next prime is 21413245054067. The reversal of 21413245054056 is 65045054231412.

It is a super-2 number, since 2×21413245054056² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21413245053999 and 21413245054017.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21708966 + ... + 22673898.

It is an arithmetic number, because the mean of its divisors is an integer number (1672913312805).

Almost surely, 2^{21413245054056} is an apocalyptic number.

It is an amenable number.

21413245054056 is an abundant number, since it is smaller than the sum of its proper divisors (32119980955704).

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

21413245054056 is a wasteful number, since it uses less digits than its factorization.

21413245054056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1889585 (or 1889581 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 42.

Adding to 21413245054056 its reverse (65045054231412), we get a palindrome (86458299285468).

The spelling of 21413245054056 in words is "twenty-one trillion, four hundred thirteen billion, two hundred forty-five million, fifty-four thousand, fifty-six".