21889683464 has 32 divisors (see below), whose sum is σ = 46721067840. Its totient is φ = 9517252800.

The previous prime is 21889683461. The next prime is 21889683481. The reversal of 21889683464 is 46438698812.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21889683461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5405507 + ... + 5409554.

It is an arithmetic number, because the mean of its divisors is an integer number (1460033370).

Almost surely, 2^21889683464 is an apocalyptic number.

It is an amenable number.

21889683464 is an abundant number, since it is smaller than the sum of its proper divisors (24831384376).

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

21889683464 is a wasteful number, since it uses less digits than its factorization.

21889683464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10815101 (or 10815097 counting only the distinct ones).

The product of its digits is 15925248, while the sum is 59.

The spelling of 21889683464 in words is "twenty-one billion, eight hundred eighty-nine million, six hundred eighty-three thousand, four hundred sixty-four".