18193920037 has 16 divisors (see below), whose sum is σ = 18995644800. Its totient is φ = 17404470720.

The previous prime is 18193919971. The next prime is 18193920077. The reversal of 18193920037 is 73002939181.

It is a cyclic number.

It is not a de Polignac number, because 18193920037 - 2¹⁵ = 18193887269 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18193919975 and 18193920002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18193920077) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1628962 + ... + 1640092.

It is an arithmetic number, because the mean of its divisors is an integer number (1187227800).

Almost surely, 2^18193920037 is an apocalyptic number.

It is an amenable number.

18193920037 is a deficient number, since it is larger than the sum of its proper divisors (801724763).

18193920037 is a wasteful number, since it uses less digits than its factorization.

18193920037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11676.

The product of its (nonzero) digits is 81648, while the sum is 43.

The spelling of 18193920037 in words is "eighteen billion, one hundred ninety-three million, nine hundred twenty thousand, thirty-seven".