20518834032 has 160 divisors (see below), whose sum is σ = 61829376000. Its totient is φ = 6506542080.

The previous prime is 20518834019. The next prime is 20518834057. The reversal of 20518834032 is 23043881502.

20518834032 is a `hidden beast` number, since 20 + 518 + 83 + 40 + 3 + 2 = 666.

It is a super-2 number, since 2×20518834032² (a number of 21 digits) contains 22 as substring.

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

It is a congruent number.

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, 777144 + ... + 803112.

It is an arithmetic number, because the mean of its divisors is an integer number (386433600).

Almost surely, 2^20518834032 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 20518834032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30914688000).

20518834032 is an abundant number, since it is smaller than the sum of its proper divisors (41310541968).

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

20518834032 is a wasteful number, since it uses less digits than its factorization.

20518834032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26076 (or 26064 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The spelling of 20518834032 in words is "twenty billion, five hundred eighteen million, eight hundred thirty-four thousand, thirty-two".