20531118080 has 184 divisors, whose sum is σ = 54358173360. Its totient is φ = 7381975040.

The previous prime is 20531118031. The next prime is 20531118103. The reversal of 20531118080 is 8081113502.

It is a super-2 number, since 2×20531118080² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 230686676 + ... + 230686764.

Almost surely, 2^20531118080 is an apocalyptic number.

20531118080 is a gapful number since it is divisible by the number (20) 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 20531118080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27179086680).

20531118080 is an abundant number, since it is smaller than the sum of its proper divisors (33827055280).

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

20531118080 is an frugal number, since it uses more digits than its factorization.

20531118080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149 (or 107 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 29.

The spelling of 20531118080 in words is "twenty billion, five hundred thirty-one million, one hundred eighteen thousand, eighty".