18103385650 has 48 divisors (see below), whose sum is σ = 39268022400. Its totient is φ = 6206869200.

The previous prime is 18103385639. The next prime is 18103385653. The reversal of 18103385650 is 5658330181.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (18103385653) 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, 510646 + ... + 544945.

It is an arithmetic number, because the mean of its divisors is an integer number (818083800).

Almost surely, 2^18103385650 is an apocalyptic number.

18103385650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18103385650 is an abundant number, since it is smaller than the sum of its proper divisors (21164636750).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18103385650 is a wasteful number, since it uses less digits than its factorization.

18103385650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1055624 (or 1055605 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 40.

The spelling of 18103385650 in words is "eighteen billion, one hundred three million, three hundred eighty-five thousand, six hundred fifty".