17920130123 has 16 divisors (see below), whose sum is σ = 20584834560. Its totient is φ = 15281799936.

The previous prime is 17920130119. The next prime is 17920130183. The reversal of 17920130123 is 32103102971.

It is a cyclic number.

It is not a de Polignac number, because 17920130123 - 2² = 17920130119 is a prime.

It is a super-2 number, since 2×17920130123² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17920130113) 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, 1105211 + ... + 1121307.

It is an arithmetic number, because the mean of its divisors is an integer number (1286552160).

Almost surely, 2^17920130123 is an apocalyptic number.

17920130123 is a deficient number, since it is larger than the sum of its proper divisors (2664704437).

17920130123 is a wasteful number, since it uses less digits than its factorization.

17920130123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16906.

The product of its (nonzero) digits is 2268, while the sum is 29.

The spelling of 17920130123 in words is "seventeen billion, nine hundred twenty million, one hundred thirty thousand, one hundred twenty-three".