15432120020 has 24 divisors (see below), whose sum is σ = 33816472704. Its totient is φ = 5904463136.

The previous prime is 15432119999. The next prime is 15432120097. The reversal of 15432120020 is 2002123451.

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

It is a junction number, because it is equal to n+sod(n) for n = 15432119974 and 15432120001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16773584 + ... + 16774503.

It is an arithmetic number, because the mean of its divisors is an integer number (1409019696).

Almost surely, 2^15432120020 is an apocalyptic number.

15432120020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15432120020 is an abundant number, since it is smaller than the sum of its proper divisors (18384352684).

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

15432120020 is a wasteful number, since it uses less digits than its factorization.

15432120020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33548119 (or 33548117 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 15432120020 its reverse (2002123451), we get a palindrome (17434243471).

The spelling of 15432120020 in words is "fifteen billion, four hundred thirty-two million, one hundred twenty thousand, twenty".