21339662652 has 96 divisors (see below), whose sum is σ = 68976714240. Its totient is φ = 5542767360.

The previous prime is 21339662639. The next prime is 21339662653. The reversal of 21339662652 is 25626693312.

21339662652 is a `hidden beast` number, since 2 + 13 + 3 + 9 + 6 + 626 + 5 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 21339662598 and 21339662607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21339662653) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1274733 + ... + 1291364.

It is an arithmetic number, because the mean of its divisors is an integer number (718507440).

Almost surely, 2^21339662652 is an apocalyptic number.

21339662652 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21339662652 is an abundant number, since it is smaller than the sum of its proper divisors (47637051588).

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

21339662652 is a wasteful number, since it uses less digits than its factorization.

21339662652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2566128 (or 2566120 counting only the distinct ones).

The product of its digits is 699840, while the sum is 45.

The spelling of 21339662652 in words is "twenty-one billion, three hundred thirty-nine million, six hundred sixty-two thousand, six hundred fifty-two".