15200021240 has 16 divisors (see below), whose sum is σ = 34200047880. Its totient is φ = 6080008480.

The previous prime is 15200021219. The next prime is 15200021257. The reversal of 15200021240 is 4212000251.

It is a super-2 number, since 2×15200021240² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190000226 + ... + 190000305.

Almost surely, 2^15200021240 is an apocalyptic number.

15200021240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15200021240 is an abundant number, since it is smaller than the sum of its proper divisors (19000026640).

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

15200021240 is a wasteful number, since it uses less digits than its factorization.

15200021240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380000542 (or 380000538 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

Adding to 15200021240 its reverse (4212000251), we get a palindrome (19412021491).

The spelling of 15200021240 in words is "fifteen billion, two hundred million, twenty-one thousand, two hundred forty".