21764496124 has 24 divisors (see below), whose sum is σ = 45819992960. Its totient is φ = 8836712496.

The previous prime is 21764496119. The next prime is 21764496137. The reversal of 21764496124 is 42169446712.

It is a super-2 number, since 2×21764496124² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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, 20454822 + ... + 20455885.

Almost surely, 2^21764496124 is an apocalyptic number.

It is an amenable number.

21764496124 is an abundant number, since it is smaller than the sum of its proper divisors (24055496836).

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

21764496124 is a wasteful number, since it uses less digits than its factorization.

21764496124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40910737 (or 40910735 counting only the distinct ones).

The product of its digits is 580608, while the sum is 46.

The spelling of 21764496124 in words is "twenty-one billion, seven hundred sixty-four million, four hundred ninety-six thousand, one hundred twenty-four".