18503801450 has 24 divisors (see below), whose sum is σ = 34487212320. Its totient is φ = 7386436400.

The previous prime is 18503801431. The next prime is 18503801489. The reversal of 18503801450 is 5410830581.

It is a self number, because there is not a number n which added to its sum of digits gives 18503801450.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 352310 + ... + 401409.

It is an arithmetic number, because the mean of its divisors is an integer number (1436967180).

Almost surely, 2^18503801450 is an apocalyptic number.

18503801450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18503801450 is a deficient number, since it is larger than the sum of its proper divisors (15983410870).

18503801450 is a wasteful number, since it uses less digits than its factorization.

18503801450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754222 (or 754217 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 35.

The spelling of 18503801450 in words is "eighteen billion, five hundred three million, eight hundred one thousand, four hundred fifty".