20559792 has 80 divisors (see below), whose sum is σ = 60496128. Its totient is φ = 5955840.

The previous prime is 20559787. The next prime is 20559809. The reversal of 20559792 is 29795502.

It is a self number, because there is not a number n which added to its sum of digits gives 20559792.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11298 + ... + 12990.

Almost surely, 2^20559792 is an apocalyptic number.

20559792 is a gapful number since it is divisible by the number (22) 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 20559792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30248064).

20559792 is an abundant number, since it is smaller than the sum of its proper divisors (39936336).

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

20559792 is a wasteful number, since it uses less digits than its factorization.

20559792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1738 (or 1732 counting only the distinct ones).

The product of its (nonzero) digits is 56700, while the sum is 39.

The square root of 20559792 is about 4534.2906832271. The cubic root of 20559792 is about 273.9510097647.

The spelling of 20559792 in words is "twenty million, five hundred fifty-nine thousand, seven hundred ninety-two".