15012040020 has 24 divisors (see below), whose sum is σ = 42033712224. Its totient is φ = 4003210656.

The previous prime is 15012039989. The next prime is 15012040027. The reversal of 15012040020 is 2004021051.

It is a super-2 number, since 2×15012040020² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15012040027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125100274 + ... + 125100393.

It is an arithmetic number, because the mean of its divisors is an integer number (1751404676).

Almost surely, 2^15012040020 is an apocalyptic number.

15012040020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15012040020 is an abundant number, since it is smaller than the sum of its proper divisors (27021672204).

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

15012040020 is a wasteful number, since it uses less digits than its factorization.

15012040020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250200679 (or 250200677 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

Adding to 15012040020 its reverse (2004021051), we get a palindrome (17016061071).

The spelling of 15012040020 in words is "fifteen billion, twelve million, forty thousand, twenty".