20413132440 has 32 divisors (see below), whose sum is σ = 61239397680. Its totient is φ = 5443501952.

The previous prime is 20413132417. The next prime is 20413132459. The reversal of 20413132440 is 4423131402.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 20413132440.

It is a congruent number.

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, 85054599 + ... + 85054838.

Almost surely, 2^20413132440 is an apocalyptic number.

20413132440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20413132440 is an abundant number, since it is smaller than the sum of its proper divisors (40826265240).

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

20413132440 is a wasteful number, since it uses less digits than its factorization.

20413132440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170109451 (or 170109447 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 20413132440 its reverse (4423131402), we get a palindrome (24836263842).

The spelling of 20413132440 in words is "twenty billion, four hundred thirteen million, one hundred thirty-two thousand, four hundred forty".