21627900274751 has 4 divisors (see below), whose sum is σ = 21627911349600. Its totient is φ = 21627889199904.

The previous prime is 21627900274733. The next prime is 21627900274753. The reversal of 21627900274751 is 15747200972612.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 21627900274751 - 2³⁴ = 21610720405567 is a prime.

It is a super-2 number, since 2×21627900274751² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21627900274693 and 21627900274702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21627900274753) 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, 1740071 + ... + 6803208.

It is an arithmetic number, because the mean of its divisors is an integer number (5406977837400).

Almost surely, 2^{21627900274751} is an apocalyptic number.

21627900274751 is a deficient number, since it is larger than the sum of its proper divisors (11074849).

21627900274751 is an equidigital number, since it uses as much as digits as its factorization.

21627900274751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11074848.

The product of its (nonzero) digits is 2963520, while the sum is 53.

The spelling of 21627900274751 in words is "twenty-one trillion, six hundred twenty-seven billion, nine hundred million, two hundred seventy-four thousand, seven hundred fifty-one".