13020172345 has 8 divisors (see below), whose sum is σ = 15635988864. Its totient is φ = 10408283184.

The previous prime is 13020172309. The next prime is 13020172367. The reversal of 13020172345 is 54327102031.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13020172345 - 2²⁵ = 12986617913 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 974539 + ... + 987808.

It is an arithmetic number, because the mean of its divisors is an integer number (1954498608).

Almost surely, 2^13020172345 is an apocalyptic number.

It is an amenable number.

13020172345 is a deficient number, since it is larger than the sum of its proper divisors (2615816519).

13020172345 is a wasteful number, since it uses less digits than its factorization.

13020172345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1963679.

The product of its (nonzero) digits is 5040, while the sum is 28.

Adding to 13020172345 its reverse (54327102031), we get a palindrome (67347274376).

The spelling of 13020172345 in words is "thirteen billion, twenty million, one hundred seventy-two thousand, three hundred forty-five".