20579551424 has 56 divisors (see below), whose sum is σ = 41277235200. Its totient is φ = 10179461376.

The previous prime is 20579551423. The next prime is 20579551483. The reversal of 20579551424 is 42415597502.

It is not an unprimeable number, because it can be changed into a prime (20579551423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2979527 + ... + 2986425.

Almost surely, 2^20579551424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20579551424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20638617600).

20579551424 is an abundant number, since it is smaller than the sum of its proper divisors (20697683776).

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

20579551424 is a wasteful number, since it uses less digits than its factorization.

20579551424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7405 (or 7395 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 44.

The spelling of 20579551424 in words is "twenty billion, five hundred seventy-nine million, five hundred fifty-one thousand, four hundred twenty-four".