15204512220 has 192 divisors, whose sum is σ = 44435865600. Its totient is φ = 3881928960.

The previous prime is 15204512209. The next prime is 15204512221. The reversal of 15204512220 is 2221540251.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15204512221) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 30966175 + ... + 30966665.

It is an arithmetic number, because the mean of its divisors is an integer number (231436800).

Almost surely, 2^15204512220 is an apocalyptic number.

15204512220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15204512220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22217932800).

15204512220 is an abundant number, since it is smaller than the sum of its proper divisors (29231353380).

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

15204512220 is a wasteful number, since it uses less digits than its factorization.

15204512220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768 (or 766 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The spelling of 15204512220 in words is "fifteen billion, two hundred four million, five hundred twelve thousand, two hundred twenty".