21631606030 has 64 divisors (see below), whose sum is σ = 41520107520. Its totient is φ = 8096023936.

The previous prime is 21631606013. The next prime is 21631606091. The reversal of 21631606030 is 3060613612.

It is a self number, because there is not a number n which added to its sum of digits gives 21631606030.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4373739 + ... + 4378681.

It is an arithmetic number, because the mean of its divisors is an integer number (648751680).

Almost surely, 2^21631606030 is an apocalyptic number.

21631606030 is a deficient number, since it is larger than the sum of its proper divisors (19888501490).

21631606030 is a wasteful number, since it uses less digits than its factorization.

21631606030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5385.

The product of its (nonzero) digits is 3888, while the sum is 28.

The spelling of 21631606030 in words is "twenty-one billion, six hundred thirty-one million, six hundred six thousand, thirty".