38193923907 has 24 divisors (see below), whose sum is σ = 55447142400. Its totient is φ = 25334427888.

The previous prime is 38193923863. The next prime is 38193923917. The reversal of 38193923907 is 70932939183.

38193923907 is a `hidden beast` number, since 3 + 81 + 93 + 92 + 390 + 7 = 666.

It is not a de Polignac number, because 38193923907 - 2²³ = 38185535299 is a prime.

It is a super-2 number, since 2×38193923907² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (38193923917) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2744188 + ... + 2758070.

It is an arithmetic number, because the mean of its divisors is an integer number (2310297600).

Almost surely, 2^38193923907 is an apocalyptic number.

38193923907 is a deficient number, since it is larger than the sum of its proper divisors (17253218493).

38193923907 is a wasteful number, since it uses less digits than its factorization.

38193923907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15407 (or 15404 counting only the distinct ones).

The product of its (nonzero) digits is 2204496, while the sum is 54.

The spelling of 38193923907 in words is "thirty-eight billion, one hundred ninety-three million, nine hundred twenty-three thousand, nine hundred seven".