21869522972 has 24 divisors (see below), whose sum is σ = 41780657520. Its totient is φ = 9933608960.

The previous prime is 21869522957. The next prime is 21869522989. The reversal of 21869522972 is 27922596812.

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, 114383 + ... + 238374.

It is an arithmetic number, because the mean of its divisors is an integer number (1740860730).

Almost surely, 2^21869522972 is an apocalyptic number.

21869522972 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21869522972 is a deficient number, since it is larger than the sum of its proper divisors (19911134548).

21869522972 is a wasteful number, since it uses less digits than its factorization.

21869522972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354181 (or 354179 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 53.

The spelling of 21869522972 in words is "twenty-one billion, eight hundred sixty-nine million, five hundred twenty-two thousand, nine hundred seventy-two".