20499032680 has 128 divisors (see below), whose sum is σ = 53334547200. Its totient is φ = 6945564672.

The previous prime is 20499032663. The next prime is 20499032681. The reversal of 20499032680 is 8623099402.

It is not an unprimeable number, because it can be changed into a prime (20499032681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17182164 + ... + 17183356.

It is an arithmetic number, because the mean of its divisors is an integer number (416676150).

Almost surely, 2^20499032680 is an apocalyptic number.

20499032680 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 20499032680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26667273600).

20499032680 is an abundant number, since it is smaller than the sum of its proper divisors (32835514520).

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

20499032680 is a wasteful number, since it uses less digits than its factorization.

20499032680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1883 (or 1879 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 43.

The spelling of 20499032680 in words is "twenty billion, four hundred ninety-nine million, thirty-two thousand, six hundred eighty".