20344280815 has 24 divisors (see below), whose sum is σ = 24923903760. Its totient is φ = 15941762304.

The previous prime is 20344280807. The next prime is 20344280839. The reversal of 20344280815 is 51808244302.

It is a happy number.

It is not a de Polignac number, because 20344280815 - 2³ = 20344280807 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15856164 + ... + 15857446.

It is an arithmetic number, because the mean of its divisors is an integer number (1038495990).

Almost surely, 2^20344280815 is an apocalyptic number.

20344280815 is a deficient number, since it is larger than the sum of its proper divisors (4579622945).

20344280815 is a wasteful number, since it uses less digits than its factorization.

20344280815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2523 (or 2470 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 37.

The spelling of 20344280815 in words is "twenty billion, three hundred forty-four million, two hundred eighty thousand, eight hundred fifteen".