38147939193 has 24 divisors (see below), whose sum is σ = 62607042624. Its totient is φ = 20120287680.

The previous prime is 38147939183. The next prime is 38147939237. The reversal of 38147939193 is 39193974183.

It is not a de Polignac number, because 38147939193 - 2¹³ = 38147931001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38147939143) 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, 3221223 + ... + 3233043.

It is an arithmetic number, because the mean of its divisors is an integer number (2608626776).

Almost surely, 2^38147939193 is an apocalyptic number.

It is an amenable number.

38147939193 is a deficient number, since it is larger than the sum of its proper divisors (24459103431).

38147939193 is an frugal number, since it uses more digits than its factorization.

38147939193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23665 (or 11844 counting only the distinct ones).

The product of its digits is 4408992, while the sum is 57.

The spelling of 38147939193 in words is "thirty-eight billion, one hundred forty-seven million, nine hundred thirty-nine thousand, one hundred ninety-three".