21268949352 has 64 divisors (see below), whose sum is σ = 61232371200. Its totient is φ = 6030448320.

The previous prime is 21268949329. The next prime is 21268949369. The reversal of 21268949352 is 25394986212.

It is a junction number, because it is equal to n+sod(n) for n = 21268949295 and 21268949304.

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 15 ways as a sum of consecutive naturals, for example, 461202 + ... + 505217.

It is an arithmetic number, because the mean of its divisors is an integer number (956755800).

Almost surely, 2^21268949352 is an apocalyptic number.

It is an amenable number.

21268949352 is an abundant number, since it is smaller than the sum of its proper divisors (39963421848).

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

21268949352 is a wasteful number, since it uses less digits than its factorization.

21268949352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 966566 (or 966562 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 51.

The spelling of 21268949352 in words is "twenty-one billion, two hundred sixty-eight million, nine hundred forty-nine thousand, three hundred fifty-two".