21702131630 has 16 divisors (see below), whose sum is σ = 39066738480. Its totient is φ = 8680207872.

The previous prime is 21702131623. The next prime is 21702131641. The reversal of 21702131630 is 3613120712.

It is a self number, because there is not a number n which added to its sum of digits gives 21702131630.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 75086 + ... + 221454.

It is an arithmetic number, because the mean of its divisors is an integer number (2441671155).

Almost surely, 2^21702131630 is an apocalyptic number.

21702131630 is a deficient number, since it is larger than the sum of its proper divisors (17364606850).

21702131630 is a wasteful number, since it uses less digits than its factorization.

21702131630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161203.

The product of its (nonzero) digits is 1512, while the sum is 26.

The spelling of 21702131630 in words is "twenty-one billion, seven hundred two million, one hundred thirty-one thousand, six hundred thirty".