15456213820 has 24 divisors (see below), whose sum is σ = 32779420128. Its totient is φ = 6121272000.

The previous prime is 15456213809. The next prime is 15456213847. The reversal of 15456213820 is 2831265451.

15456213820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 15456213820.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3823776 + ... + 3827815.

It is an arithmetic number, because the mean of its divisors is an integer number (1365809172).

Almost surely, 2^15456213820 is an apocalyptic number.

15456213820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15456213820 is an abundant number, since it is smaller than the sum of its proper divisors (17323206308).

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

15456213820 is a wasteful number, since it uses less digits than its factorization.

15456213820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7651701 (or 7651699 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 37.

The spelling of 15456213820 in words is "fifteen billion, four hundred fifty-six million, two hundred thirteen thousand, eight hundred twenty".