18932948397 has 32 divisors (see below), whose sum is σ = 30607248000. Its totient is φ = 11471310720.

The previous prime is 18932948369. The next prime is 18932948407. The reversal of 18932948397 is 79384923981.

18932948397 is a `hidden beast` number, since 189 + 3 + 29 + 48 + 397 = 666.

It is not a de Polignac number, because 18932948397 - 2⁸ = 18932948141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18932941397) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1469379 + ... + 1482207.

It is an arithmetic number, because the mean of its divisors is an integer number (956476500).

Almost surely, 2^18932948397 is an apocalyptic number.

It is an amenable number.

18932948397 is a deficient number, since it is larger than the sum of its proper divisors (11674299603).

18932948397 is a wasteful number, since it uses less digits than its factorization.

18932948397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17818 (or 17812 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 63.

The spelling of 18932948397 in words is "eighteen billion, nine hundred thirty-two million, nine hundred forty-eight thousand, three hundred ninety-seven".