21274417350 has 36 divisors (see below), whose sum is σ = 57157269156. Its totient is φ = 5673177840.

The previous prime is 21274417349. The next prime is 21274417441. The reversal of 21274417350 is 5371447212.

21274417350 is a `hidden beast` number, since 21 + 274 + 4 + 17 + 350 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 23637792 + ... + 23638691.

It is an arithmetic number, because the mean of its divisors is an integer number (1587701921).

Almost surely, 2^21274417350 is an apocalyptic number.

21274417350 is an abundant number, since it is smaller than the sum of its proper divisors (35882851806).

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

21274417350 is a wasteful number, since it uses less digits than its factorization.

21274417350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47276501 (or 47276493 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The spelling of 21274417350 in words is "twenty-one billion, two hundred seventy-four million, four hundred seventeen thousand, three hundred fifty".