13020172344 has 48 divisors (see below), whose sum is σ = 35414355600. Its totient is φ = 4321425024.

The previous prime is 13020172309. The next prime is 13020172367. The reversal of 13020172344 is 44327102031.

13020172344 = T₁₀₄₅₅ + T₁₀₄₅₆ + ... + T₁₀₆₈₇.

It is a happy number.

13020172344 is a `hidden beast` number, since 1 + 302 + 0 + 17 + 2 + 344 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 371284 + ... + 404835.

It is an arithmetic number, because the mean of its divisors is an integer number (737799075).

Almost surely, 2^13020172344 is an apocalyptic number.

It is an amenable number.

13020172344 is an abundant number, since it is smaller than the sum of its proper divisors (22394183256).

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

13020172344 is a wasteful number, since it uses less digits than its factorization.

13020172344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776364 (or 776357 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

Adding to 13020172344 its reverse (44327102031), we get a palindrome (57347274375).

The spelling of 13020172344 in words is "thirteen billion, twenty million, one hundred seventy-two thousand, three hundred forty-four".