15013522420 has 48 divisors (see below), whose sum is σ = 33962595408. Its totient is φ = 5541995520.

The previous prime is 15013522417. The next prime is 15013522423. The reversal of 15013522420 is 2422531051.

It is an interprime number because it is at equal distance from previous prime (15013522417) and next prime (15013522423).

It can be written as a sum of positive squares in 8 ways, for example, as 2258530576 + 12754991844 = 47524^2 + 112938^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15013522423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1966210 + ... + 1973830.

It is an arithmetic number, because the mean of its divisors is an integer number (707554071).

Almost surely, 2^15013522420 is an apocalyptic number.

15013522420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15013522420 is an abundant number, since it is smaller than the sum of its proper divisors (18949072988).

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

15013522420 is a wasteful number, since it uses less digits than its factorization.

15013522420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15220 (or 15218 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The spelling of 15013522420 in words is "fifteen billion, thirteen million, five hundred twenty-two thousand, four hundred twenty".