20132431040 has 56 divisors (see below), whose sum is σ = 49593489840. Its totient is φ = 7775280128.

The previous prime is 20132431031. The next prime is 20132431073. The reversal of 20132431040 is 4013423102.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1075442 + ... + 1094001.

Almost surely, 2^20132431040 is an apocalyptic number.

20132431040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20132431040 is an abundant number, since it is smaller than the sum of its proper divisors (29461058800).

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

20132431040 is a wasteful number, since it uses less digits than its factorization.

20132431040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2169489 (or 2169479 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 20132431040 its reverse (4013423102), we get a palindrome (24145854142).

The spelling of 20132431040 in words is "twenty billion, one hundred thirty-two million, four hundred thirty-one thousand, forty".