18393942325 has 24 divisors (see below), whose sum is σ = 25411409280. Its totient is φ = 13092777600.

The previous prime is 18393942323. The next prime is 18393942373. The reversal of 18393942325 is 52324939381.

It is not a de Polignac number, because 18393942325 - 2¹ = 18393942323 is a prime.

It is a super-2 number, since 2×18393942325² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18393942323) 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, 698640 + ... + 724489.

It is an arithmetic number, because the mean of its divisors is an integer number (1058808720).

Almost surely, 2^18393942325 is an apocalyptic number.

It is an amenable number.

18393942325 is a deficient number, since it is larger than the sum of its proper divisors (7017466955).

18393942325 is a wasteful number, since it uses less digits than its factorization.

18393942325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1423197 (or 1423192 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 49.

The spelling of 18393942325 in words is "eighteen billion, three hundred ninety-three million, nine hundred forty-two thousand, three hundred twenty-five".