20741230656 has 70 divisors (see below), whose sum is σ = 61483520670. Its totient is φ = 6913741824.

The previous prime is 20741230649. The next prime is 20741230709. The reversal of 20741230656 is 65603214702.

20741230656 is a `hidden beast` number, since 207 + 412 + 30 + 6 + 5 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20159456256 + 581774400 = 141984^2 + 24120^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 20741230656.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1995321 + ... + 2005688.

Almost surely, 2^20741230656 is an apocalyptic number.

It is an amenable number.

20741230656 is an abundant number, since it is smaller than the sum of its proper divisors (40742290014).

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

20741230656 is an equidigital number, since it uses as much as digits as its factorization.

20741230656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4001033 (or 4001014 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The spelling of 20741230656 in words is "twenty billion, seven hundred forty-one million, two hundred thirty thousand, six hundred fifty-six".