20590479504 has 160 divisors (see below), whose sum is σ = 68202301440. Its totient is φ = 5825789568.

The previous prime is 20590479473. The next prime is 20590479563. The reversal of 20590479504 is 40597409502.

20590479504 is a `hidden beast` number, since 2 + 0 + 590 + 4 + 7 + 9 + 50 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 20590479504.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 278419 + ... + 344525.

It is an arithmetic number, because the mean of its divisors is an integer number (426264384).

Almost surely, 2^20590479504 is an apocalyptic number.

20590479504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20590479504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34101150720).

20590479504 is an abundant number, since it is smaller than the sum of its proper divisors (47611821936).

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

20590479504 is a wasteful number, since it uses less digits than its factorization.

20590479504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66234 (or 66222 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 45.

The spelling of 20590479504 in words is "twenty billion, five hundred ninety million, four hundred seventy-nine thousand, five hundred four".