18740944490 has 16 divisors (see below), whose sum is σ = 34112732040. Its totient is φ = 7412148480.

The previous prime is 18740944489. The next prime is 18740944511. The reversal of 18740944490 is 9444904781.

It can be written as a sum of positive squares in 4 ways, for example, as 17080137481 + 1660807009 = 130691^2 + 40753^2 .

It is a super-2 number, since 2×18740944490² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10527731 + ... + 10529510.

Almost surely, 2^18740944490 is an apocalyptic number.

18740944490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18740944490 is a deficient number, since it is larger than the sum of its proper divisors (15371787550).

18740944490 is a wasteful number, since it uses less digits than its factorization.

18740944490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21057337.

The product of its (nonzero) digits is 1161216, while the sum is 50.

The spelling of 18740944490 in words is "eighteen billion, seven hundred forty million, nine hundred forty-four thousand, four hundred ninety".