21703286631 has 16 divisors (see below), whose sum is σ = 31484974304. Its totient is φ = 13218177024.

The previous prime is 21703286621. The next prime is 21703286639. The reversal of 21703286631 is 13668230712.

It is not a de Polignac number, because 21703286631 - 2⁵ = 21703286599 is a prime.

It is a super-2 number, since 2×21703286631² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21703286631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21703286639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2864746 + ... + 2872311.

It is an arithmetic number, because the mean of its divisors is an integer number (1967810894).

Almost surely, 2^21703286631 is an apocalyptic number.

21703286631 is a deficient number, since it is larger than the sum of its proper divisors (9781687673).

21703286631 is a wasteful number, since it uses less digits than its factorization.

21703286631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5737170.

The product of its (nonzero) digits is 72576, while the sum is 39.

The spelling of 21703286631 in words is "twenty-one billion, seven hundred three million, two hundred eighty-six thousand, six hundred thirty-one".