15420743520 has 768 divisors, whose sum is σ = 66694440960. Its totient is φ = 2898395136.

The previous prime is 15420743497. The next prime is 15420743521. The reversal of 15420743520 is 2534702451.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15420743521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 14108094 + ... + 14109186.

It is an arithmetic number, because the mean of its divisors is an integer number (86841720).

Almost surely, 2^15420743520 is an apocalyptic number.

15420743520 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 15420743520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33347220480).

15420743520 is an abundant number, since it is smaller than the sum of its proper divisors (51273697440).

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

15420743520 is a wasteful number, since it uses less digits than its factorization.

15420743520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1167 (or 1159 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 33.

The spelling of 15420743520 in words is "fifteen billion, four hundred twenty million, seven hundred forty-three thousand, five hundred twenty".