21372505051074 has 16 divisors (see below), whose sum is σ = 42793750147008. Its totient is φ = 7116045009552.

The previous prime is 21372505051067. The next prime is 21372505051103. The reversal of 21372505051074 is 47015050527312.

It is a happy 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, 2030829502 + ... + 2030840025.

It is an arithmetic number, because the mean of its divisors is an integer number (2674609384188).

Almost surely, 2^{21372505051074} is an apocalyptic number.

21372505051074 is an abundant number, since it is smaller than the sum of its proper divisors (21421245095934).

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

21372505051074 is a wasteful number, since it uses less digits than its factorization.

21372505051074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4061670409.

The product of its (nonzero) digits is 294000, while the sum is 42.

Adding to 21372505051074 its reverse (47015050527312), we get a palindrome (68387555578386).

The spelling of 21372505051074 in words is "twenty-one trillion, three hundred seventy-two billion, five hundred five million, fifty-one thousand, seventy-four".