21983642259984 has 100 divisors (see below), whose sum is σ = 64210773383020. Its totient is φ = 7260652442880.

The previous prime is 21983642259973. The next prime is 21983642260001. The reversal of 21983642259984 is 48995224638912.

21983642259984 is a `hidden beast` number, since 2 + 1 + 9 + 8 + 3 + 6 + 4 + 22 + 599 + 8 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 7784100000000 + 14199542259984 = 2790000^2 + 3768228^2 .

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 77669227 + ... + 77951754.

Almost surely, 2^{21983642259984} is an apocalyptic number.

21983642259984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21983642259984 is an abundant number, since it is smaller than the sum of its proper divisors (42227131123036).

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

21983642259984 is a wasteful number, since it uses less digits than its factorization.

21983642259984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155621110 (or 155621095 counting only the distinct ones).

The product of its digits is 537477120, while the sum is 72.

The spelling of 21983642259984 in words is "twenty-one trillion, nine hundred eighty-three billion, six hundred forty-two million, two hundred fifty-nine thousand, nine hundred eighty-four".