21002342412 has 24 divisors (see below), whose sum is σ = 50329938736. Its totient is φ = 6811570368.

The previous prime is 21002342407. The next prime is 21002342443. The reversal of 21002342412 is 21424320012.

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, 23650843 + ... + 23651730.

Almost surely, 2^21002342412 is an apocalyptic number.

It is an amenable number.

21002342412 is an abundant number, since it is smaller than the sum of its proper divisors (29327596324).

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

21002342412 is a wasteful number, since it uses less digits than its factorization.

21002342412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47302617 (or 47302615 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 21002342412 its reverse (21424320012), we get a palindrome (42426662424).

The spelling of 21002342412 in words is "twenty-one billion, two million, three hundred forty-two thousand, four hundred twelve".