20332400540 has 24 divisors (see below), whose sum is σ = 44170388640. Its totient is φ = 7852513088.

The previous prime is 20332400531. The next prime is 20332400587. The reversal of 20332400540 is 4500423302.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17527352 + ... + 17528511.

It is an arithmetic number, because the mean of its divisors is an integer number (1840432860).

Almost surely, 2^20332400540 is an apocalyptic number.

20332400540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20332400540 is an abundant number, since it is smaller than the sum of its proper divisors (23837988100).

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

20332400540 is a wasteful number, since it uses less digits than its factorization.

20332400540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35055901 (or 35055899 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 23.

Adding to 20332400540 its reverse (4500423302), we get a palindrome (24832823842).

The spelling of 20332400540 in words is "twenty billion, three hundred thirty-two million, four hundred thousand, five hundred forty".