15020620440 has 128 divisors (see below), whose sum is σ = 51528476160. Its totient is φ = 3431337984.

The previous prime is 15020620403. The next prime is 15020620451. The reversal of 15020620440 is 4402602051.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 15020620440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1905387 + ... + 1913253.

It is an arithmetic number, because the mean of its divisors is an integer number (402566220).

Almost surely, 2^15020620440 is an apocalyptic number.

15020620440 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 15020620440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25764238080).

15020620440 is an abundant number, since it is smaller than the sum of its proper divisors (36507855720).

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

15020620440 is a wasteful number, since it uses less digits than its factorization.

15020620440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10161 (or 10157 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The spelling of 15020620440 in words is "fifteen billion, twenty million, six hundred twenty thousand, four hundred forty".