15420517400 has 24 divisors (see below), whose sum is σ = 35852703420. Its totient is φ = 6168206880.

The previous prime is 15420517397. The next prime is 15420517423. The reversal of 15420517400 is 471502451.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38551094 + ... + 38551493.

Almost surely, 2^15420517400 is an apocalyptic number.

15420517400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15420517400 is an abundant number, since it is smaller than the sum of its proper divisors (20432186020).

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

15420517400 is a wasteful number, since it uses less digits than its factorization.

15420517400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77102603 (or 77102594 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 29.

It can be divided in two parts, 1542051 and 7400, that added together give a palindrome (1549451).

The spelling of 15420517400 in words is "fifteen billion, four hundred twenty million, five hundred seventeen thousand, four hundred".