21507460373412 has 144 divisors (see below), whose sum is σ = 60129943997760. Its totient is φ = 6441104160000.

The previous prime is 21507460373383. The next prime is 21507460373437. The reversal of 21507460373412 is 21437306470512.

It is a happy number.

21507460373412 is a `hidden beast` number, since 2 + 1 + 5 + 0 + 7 + 4 + 603 + 7 + 34 + 1 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1067214 + ... + 6644837.

It is an arithmetic number, because the mean of its divisors is an integer number (417569055540).

Almost surely, 2^{21507460373412} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21507460373412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30064971998880).

21507460373412 is an abundant number, since it is smaller than the sum of its proper divisors (38622483624348).

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

21507460373412 is a wasteful number, since it uses less digits than its factorization.

21507460373412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7712234 (or 7712229 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 45.

The spelling of 21507460373412 in words is "twenty-one trillion, five hundred seven billion, four hundred sixty million, three hundred seventy-three thousand, four hundred twelve".