194123133908 has 24 divisors (see below), whose sum is σ = 370726614720. Its totient is φ = 88207334720.

The previous prime is 194123133899. The next prime is 194123133913. The reversal of 194123133908 is 809331321491.

It is a super-2 number, since 2×194123133908² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent 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, 632153 + ... + 887616.

It is an arithmetic number, because the mean of its divisors is an integer number (15446942280).

Almost surely, 2^194123133908 is an apocalyptic number.

It is an amenable number.

194123133908 is a deficient number, since it is larger than the sum of its proper divisors (176603480812).

194123133908 is a wasteful number, since it uses less digits than its factorization.

194123133908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1522687 (or 1522685 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 44.

The spelling of 194123133908 in words is "one hundred ninety-four billion, one hundred twenty-three million, one hundred thirty-three thousand, nine hundred eight".