20132690840 has 64 divisors (see below), whose sum is σ = 47900401920. Its totient is φ = 7603200000.

The previous prime is 20132690839. The next prime is 20132690843. The reversal of 20132690840 is 4809623102.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 20132690840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20132690843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147161 + ... + 248840.

It is an arithmetic number, because the mean of its divisors is an integer number (748443780).

Almost surely, 2^20132690840 is an apocalyptic number.

20132690840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20132690840 is an abundant number, since it is smaller than the sum of its proper divisors (27767711080).

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

20132690840 is a wasteful number, since it uses less digits than its factorization.

20132690840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396084 (or 396080 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The spelling of 20132690840 in words is "twenty billion, one hundred thirty-two million, six hundred ninety thousand, eight hundred forty".