18905426544 has 40 divisors (see below), whose sum is σ = 48853190160. Its totient is φ = 6299980288.

The previous prime is 18905426543. The next prime is 18905426597. The reversal of 18905426544 is 44562450981.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 18905426493 and 18905426502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18905426543) 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, 115372 + ... + 226100.

It is an arithmetic number, because the mean of its divisors is an integer number (1221329754).

Almost surely, 2^18905426544 is an apocalyptic number.

It is an amenable number.

18905426544 is an abundant number, since it is smaller than the sum of its proper divisors (29947763616).

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

18905426544 is a wasteful number, since it uses less digits than its factorization.

18905426544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114297 (or 114291 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 48.

The spelling of 18905426544 in words is "eighteen billion, nine hundred five million, four hundred twenty-six thousand, five hundred forty-four".