21335750056 has 8 divisors (see below), whose sum is σ = 40004531370. Its totient is φ = 10667875024.

The previous prime is 21335749987. The next prime is 21335750071. The reversal of 21335750056 is 65005753312.

It can be written as a sum of positive squares in only one way, i.e., 19562497956 + 1773252100 = 139866^2 + 42110^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 21335749997 and 21335750024.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1333484371 + ... + 1333484386.

Almost surely, 2^21335750056 is an apocalyptic number.

It is an amenable number.

21335750056 is a deficient number, since it is larger than the sum of its proper divisors (18668781314).

21335750056 is a wasteful number, since it uses less digits than its factorization.

21335750056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2666968763 (or 2666968759 counting only the distinct ones).

The product of its (nonzero) digits is 94500, while the sum is 37.

The spelling of 21335750056 in words is "twenty-one billion, three hundred thirty-five million, seven hundred fifty thousand, fifty-six".