21372755619432 has 32 divisors (see below), whose sum is σ = 61065016056000. Its totient is φ = 6106501605504.

The previous prime is 21372755619431. The next prime is 21372755619473. The reversal of 21372755619432 is 23491655727312.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21372755619431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63609391557 + ... + 63609391892.

It is an arithmetic number, because the mean of its divisors is an integer number (1908281751750).

Almost surely, 2^{21372755619432} is an apocalyptic number.

It is an amenable number.

21372755619432 is an abundant number, since it is smaller than the sum of its proper divisors (39692260436568).

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

21372755619432 is a wasteful number, since it uses less digits than its factorization.

21372755619432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127218783465 (or 127218783461 counting only the distinct ones).

The product of its digits is 19051200, while the sum is 57.

The spelling of 21372755619432 in words is "twenty-one trillion, three hundred seventy-two billion, seven hundred fifty-five million, six hundred nineteen thousand, four hundred thirty-two".