21973233971400 has 48 divisors (see below), whose sum is σ = 68117025313200. Its totient is φ = 5859529058880.

The previous prime is 21973233971399. The next prime is 21973233971417. The reversal of 21973233971400 is 417933237912.

It is a happy number.

It is a super-2 number, since 2×21973233971400² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18311027710 + ... + 18311028909.

It is an arithmetic number, because the mean of its divisors is an integer number (1419104694025).

Almost surely, 2^{21973233971400} is an apocalyptic number.

21973233971400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21973233971400 is an abundant number, since it is smaller than the sum of its proper divisors (46143791341800).

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

21973233971400 is a wasteful number, since it uses less digits than its factorization.

21973233971400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36622056638 (or 36622056629 counting only the distinct ones).

The product of its (nonzero) digits is 1714608, while the sum is 51.

The spelling of 21973233971400 in words is "twenty-one trillion, nine hundred seventy-three billion, two hundred thirty-three million, nine hundred seventy-one thousand, four hundred".