21037914018 has 72 divisors (see below), whose sum is σ = 53050001004. Its totient is φ = 6000107520.

The previous prime is 21037914017. The next prime is 21037914041. The reversal of 21037914018 is 81041973012.

It is a happy number.

21037914018 is a `hidden beast` number, since 210 + 37 + 9 + 1 + 401 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20426983929 + 610930089 = 142923^2 + 24717^2 .

It is not an unprimeable number, because it can be changed into a prime (21037914013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 247071 + ... + 321122.

Almost surely, 2^21037914018 is an apocalyptic number.

21037914018 is an abundant number, since it is smaller than the sum of its proper divisors (32012086986).

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

21037914018 is a wasteful number, since it uses less digits than its factorization.

21037914018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568240 (or 568226 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The spelling of 21037914018 in words is "twenty-one billion, thirty-seven million, nine hundred fourteen thousand, eighteen".