15420742220 has 48 divisors (see below), whose sum is σ = 35013692448. Its totient is φ = 5671104000.

The previous prime is 15420742217. The next prime is 15420742241. The reversal of 15420742220 is 2224702451.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52889 + ... + 183408.

It is an arithmetic number, because the mean of its divisors is an integer number (729451926).

Almost surely, 2^15420742220 is an apocalyptic number.

15420742220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15420742220 is an abundant number, since it is smaller than the sum of its proper divisors (19592950228).

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

15420742220 is a wasteful number, since it uses less digits than its factorization.

15420742220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236570 (or 236568 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 29.

The spelling of 15420742220 in words is "fifteen billion, four hundred twenty million, seven hundred forty-two thousand, two hundred twenty".