21630645031416 has 32 divisors (see below), whose sum is σ = 54076984166400. Its totient is φ = 7210165465440.

The previous prime is 21630645031399. The next prime is 21630645031427. The reversal of 21630645031416 is 61413054603612.

It is a happy number.

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, 556851 + ... + 6600861.

It is an arithmetic number, because the mean of its divisors is an integer number (1689905755200).

Almost surely, 2^{21630645031416} is an apocalyptic number.

It is an amenable number.

21630645031416 is an abundant number, since it is smaller than the sum of its proper divisors (32446339134984).

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

21630645031416 is a wasteful number, since it uses less digits than its factorization.

21630645031416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6193139 (or 6193135 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 21630645031416 in words is "twenty-one trillion, six hundred thirty billion, six hundred forty-five million, thirty-one thousand, four hundred sixteen".