18810144654 has 16 divisors (see below), whose sum is σ = 42994616448. Its totient is φ = 5374327032.

The previous prime is 18810144643. The next prime is 18810144659. The reversal of 18810144654 is 45644101881.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 447860587 = 18810144654 / (1 + 8 + 8 + 1 + 0 + 1 + 4 + 4 + 6 + 5 + 4).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18810144659) 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, 223930252 + ... + 223930335.

It is an arithmetic number, because the mean of its divisors is an integer number (2687163528).

Almost surely, 2^18810144654 is an apocalyptic number.

18810144654 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18810144654 is an abundant number, since it is smaller than the sum of its proper divisors (24184471794).

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

18810144654 is a wasteful number, since it uses less digits than its factorization.

18810144654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447860599.

The product of its (nonzero) digits is 122880, while the sum is 42.

The spelling of 18810144654 in words is "eighteen billion, eight hundred ten million, one hundred forty-four thousand, six hundred fifty-four".