20930621949433 has 32 divisors (see below), whose sum is σ = 25345416499200. Its totient is φ = 16873474832640.

The previous prime is 20930621949407. The next prime is 20930621949529. The reversal of 20930621949433 is 33494912603902.

It is a cyclic number.

It is not a de Polignac number, because 20930621949433 - 2²¹ = 20930619852281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20930621949533) 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, 2228791168 + ... + 2228800558.

It is an arithmetic number, because the mean of its divisors is an integer number (792044265600).

Almost surely, 2^{20930621949433} is an apocalyptic number.

It is an amenable number.

20930621949433 is a deficient number, since it is larger than the sum of its proper divisors (4414794549767).

20930621949433 is a wasteful number, since it uses less digits than its factorization.

20930621949433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20437.

The product of its (nonzero) digits is 7558272, while the sum is 55.

The spelling of 20930621949433 in words is "twenty trillion, nine hundred thirty billion, six hundred twenty-one million, nine hundred forty-nine thousand, four hundred thirty-three".