18774149450 has 24 divisors (see below), whose sum is σ = 39908478432. Its totient is φ = 6436851120.

The previous prime is 18774149437. The next prime is 18774149467. The reversal of 18774149450 is 5494147781.

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

It is a Harshad number since it is a multiple of its sum of digits (50).

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, 26819864 + ... + 26820563.

It is an arithmetic number, because the mean of its divisors is an integer number (1662853268).

Almost surely, 2^18774149450 is an apocalyptic number.

18774149450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18774149450 is an abundant number, since it is smaller than the sum of its proper divisors (21134328982).

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

18774149450 is a wasteful number, since it uses less digits than its factorization.

18774149450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53640446 (or 53640441 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 50.

The spelling of 18774149450 in words is "eighteen billion, seven hundred seventy-four million, one hundred forty-nine thousand, four hundred fifty".