21970805432 has 32 divisors (see below), whose sum is σ = 41544763920. Its totient is φ = 10892344320.

The previous prime is 21970805431. The next prime is 21970805443. The reversal of 21970805432 is 23450807912.

It is a self number, because there is not a number n which added to its sum of digits gives 21970805432.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21970805431) by changing a digit.

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, 1330088 + ... + 1346504.

Almost surely, 2^21970805432 is an apocalyptic number.

It is an amenable number.

21970805432 is a deficient number, since it is larger than the sum of its proper divisors (19573958488).

21970805432 is a wasteful number, since it uses less digits than its factorization.

21970805432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17831 (or 17827 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 41.

The spelling of 21970805432 in words is "twenty-one billion, nine hundred seventy million, eight hundred five thousand, four hundred thirty-two".