21964669382 has 16 divisors (see below), whose sum is σ = 34391952000. Its totient is φ = 10508646720.

The previous prime is 21964669343. The next prime is 21964669403. The reversal of 21964669382 is 28396646912.

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, 1984757 + ... + 1995792.

It is an arithmetic number, because the mean of its divisors is an integer number (2149497000).

Almost surely, 2^21964669382 is an apocalyptic number.

21964669382 is a deficient number, since it is larger than the sum of its proper divisors (12427282618).

21964669382 is a wasteful number, since it uses less digits than its factorization.

21964669382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3980671.

The product of its digits is 6718464, while the sum is 56.

The spelling of 21964669382 in words is "twenty-one billion, nine hundred sixty-four million, six hundred sixty-nine thousand, three hundred eighty-two".