21237530814 has 24 divisors (see below), whose sum is σ = 46024226352. Its totient is φ = 7077703680.

The previous prime is 21237530759. The next prime is 21237530819. The reversal of 21237530814 is 41803573212.

21237530814 is a `hidden beast` number, since 2 + 12 + 37 + 530 + 81 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21237530819) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32067 + ... + 208574.

It is an arithmetic number, because the mean of its divisors is an integer number (1917676098).

Almost surely, 2^21237530814 is an apocalyptic number.

21237530814 is an abundant number, since it is smaller than the sum of its proper divisors (24786695538).

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

21237530814 is a wasteful number, since it uses less digits than its factorization.

21237530814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245552 (or 245549 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The spelling of 21237530814 in words is "twenty-one billion, two hundred thirty-seven million, five hundred thirty thousand, eight hundred fourteen".