18193940348 has 12 divisors (see below), whose sum is σ = 31915387560. Its totient is φ = 9075258192.

The previous prime is 18193940339. The next prime is 18193940357. The reversal of 18193940348 is 84304939181.

It is an interprime number because it is at equal distance from previous prime (18193940339) and next prime (18193940357).

It is a super-2 number, since 2×18193940348² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 18193940296 and 18193940305.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5426111 + ... + 5429462.

It is an arithmetic number, because the mean of its divisors is an integer number (2659615630).

Almost surely, 2^18193940348 is an apocalyptic number.

It is an amenable number.

18193940348 is a deficient number, since it is larger than the sum of its proper divisors (13721447212).

18193940348 is a wasteful number, since it uses less digits than its factorization.

18193940348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10855996 (or 10855994 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 50.

The spelling of 18193940348 in words is "eighteen billion, one hundred ninety-three million, nine hundred forty thousand, three hundred forty-eight".