21137059630 has 16 divisors (see below), whose sum is σ = 38187105984. Its totient is φ = 8423624160.

The previous prime is 21137059589. The next prime is 21137059687. The reversal of 21137059630 is 3695073112.

It is a self number, because there is not a number n which added to its sum of digits gives 21137059630.

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, 3897117 + ... + 3902536.

It is an arithmetic number, because the mean of its divisors is an integer number (2386694124).

Almost surely, 2^21137059630 is an apocalyptic number.

21137059630 is a deficient number, since it is larger than the sum of its proper divisors (17050046354).

21137059630 is a wasteful number, since it uses less digits than its factorization.

21137059630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7799931.

The product of its (nonzero) digits is 34020, while the sum is 37.

The spelling of 21137059630 in words is "twenty-one billion, one hundred thirty-seven million, fifty-nine thousand, six hundred thirty".