15213563420 has 48 divisors (see below), whose sum is σ = 35212248288. Its totient is φ = 5475164160.

The previous prime is 15213563401. The next prime is 15213563423. The reversal of 15213563420 is 2436531251.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15213563423) 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, 335117 + ... + 377796.

It is an arithmetic number, because the mean of its divisors is an integer number (733588506).

Almost surely, 2^15213563420 is an apocalyptic number.

15213563420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15213563420 is an abundant number, since it is smaller than the sum of its proper divisors (19998684868).

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

15213563420 is a wasteful number, since it uses less digits than its factorization.

15213563420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713030 (or 713028 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The spelling of 15213563420 in words is "fifteen billion, two hundred thirteen million, five hundred sixty-three thousand, four hundred twenty".