21182793272 has 32 divisors (see below), whose sum is σ = 41311987200. Its totient is φ = 10171480800.

The previous prime is 21182793251. The next prime is 21182793293. The reversal of 21182793272 is 27239728112.

It is an interprime number because it is at equal distance from previous prime (21182793251) and next prime (21182793293).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 293522 + ... + 358497.

It is an arithmetic number, because the mean of its divisors is an integer number (1290999600).

Almost surely, 2^21182793272 is an apocalyptic number.

It is an amenable number.

21182793272 is a deficient number, since it is larger than the sum of its proper divisors (20129193928).

21182793272 is a wasteful number, since it uses less digits than its factorization.

21182793272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652187 (or 652183 counting only the distinct ones).

The product of its digits is 169344, while the sum is 44.

The spelling of 21182793272 in words is "twenty-one billion, one hundred eighty-two million, seven hundred ninety-three thousand, two hundred seventy-two".