21660792630 has 16 divisors (see below), whose sum is σ = 51985902384. Its totient is φ = 5776211360.

The previous prime is 21660792619. The next prime is 21660792631. The reversal of 21660792630 is 3629706612.

It is a super-3 number, since 3×21660792630³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21660792631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 361013181 + ... + 361013240.

It is an arithmetic number, because the mean of its divisors is an integer number (3249118899).

Almost surely, 2^21660792630 is an apocalyptic number.

21660792630 is an abundant number, since it is smaller than the sum of its proper divisors (30325109754).

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

21660792630 is a wasteful number, since it uses less digits than its factorization.

21660792630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722026431.

The product of its (nonzero) digits is 163296, while the sum is 42.

The spelling of 21660792630 in words is "twenty-one billion, six hundred sixty million, seven hundred ninety-two thousand, six hundred thirty".