21627248764 has 24 divisors (see below), whose sum is σ = 41298034176. Its totient is φ = 9828270000.

The previous prime is 21627248761. The next prime is 21627248777. The reversal of 21627248764 is 46784272612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21627248761) 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, 140629 + ... + 251059.

It is an arithmetic number, because the mean of its divisors is an integer number (1720751424).

Almost surely, 2^21627248764 is an apocalyptic number.

It is an amenable number.

21627248764 is a deficient number, since it is larger than the sum of its proper divisors (19670785412).

21627248764 is a wasteful number, since it uses less digits than its factorization.

21627248764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114897 (or 114895 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 49.

The spelling of 21627248764 in words is "twenty-one billion, six hundred twenty-seven million, two hundred forty-eight thousand, seven hundred sixty-four".