21702952784 has 20 divisors (see below), whose sum is σ = 42380573184. Its totient is φ = 10766030688.

The previous prime is 21702952729. The next prime is 21702952793. The reversal of 21702952784 is 48725920712.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5338262 + ... + 5342325.

Almost surely, 2^21702952784 is an apocalyptic number.

It is an amenable number.

21702952784 is a deficient number, since it is larger than the sum of its proper divisors (20677620400).

21702952784 is a wasteful number, since it uses less digits than its factorization.

21702952784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10680722 (or 10680716 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 47.

The spelling of 21702952784 in words is "twenty-one billion, seven hundred two million, nine hundred fifty-two thousand, seven hundred eighty-four".