18542418890 has 16 divisors (see below), whose sum is σ = 33403801032. Its totient is φ = 7410868224.

The previous prime is 18542418887. The next prime is 18542418899. The reversal of 18542418890 is 9881424581.

It can be written as a sum of positive squares in 4 ways, for example, as 6927399361 + 11615019529 = 83231^2 + 107773^2 .

It is not an unprimeable number, because it can be changed into a prime (18542418899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 749639 + ... + 773978.

Almost surely, 2^18542418890 is an apocalyptic number.

18542418890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18542418890 is a deficient number, since it is larger than the sum of its proper divisors (14861382142).

18542418890 is a wasteful number, since it uses less digits than its factorization.

18542418890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1524841.

The product of its (nonzero) digits is 737280, while the sum is 50.

The spelling of 18542418890 in words is "eighteen billion, five hundred forty-two million, four hundred eighteen thousand, eight hundred ninety".