21620473750256 has 10 divisors (see below), whose sum is σ = 41889667891152. Its totient is φ = 10810236875120.

The previous prime is 21620473750223. The next prime is 21620473750279. The reversal of 21620473750256 is 65205737402612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 675639804680 + ... + 675639804711.

Almost surely, 2^{21620473750256} is an apocalyptic number.

It is an amenable number.

21620473750256 is a deficient number, since it is larger than the sum of its proper divisors (20269194140896).

21620473750256 is a wasteful number, since it uses less digits than its factorization.

21620473750256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1351279609399 (or 1351279609393 counting only the distinct ones).

The product of its (nonzero) digits is 4233600, while the sum is 50.

The spelling of 21620473750256 in words is "twenty-one trillion, six hundred twenty billion, four hundred seventy-three million, seven hundred fifty thousand, two hundred fifty-six".