15420438513 has 24 divisors (see below), whose sum is σ = 23492476800. Its totient is φ = 9720035424.

The previous prime is 15420438503. The next prime is 15420438529. The reversal of 15420438513 is 31583402451.

15420438513 is a `hidden beast` number, since 154 + 20 + 438 + 51 + 3 = 666.

It is not a de Polignac number, because 15420438513 - 2²¹ = 15418341361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15420438503) 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 23 ways as a sum of consecutive naturals, for example, 1545 + ... + 175622.

It is an arithmetic number, because the mean of its divisors is an integer number (978853200).

Almost surely, 2^15420438513 is an apocalyptic number.

It is an amenable number.

15420438513 is a deficient number, since it is larger than the sum of its proper divisors (8072038287).

15420438513 is a wasteful number, since it uses less digits than its factorization.

15420438513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177701 (or 177698 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 15420438513 in words is "fifteen billion, four hundred twenty million, four hundred thirty-eight thousand, five hundred thirteen".