18420561596 has 6 divisors (see below), whose sum is σ = 32235982800. Its totient is φ = 9210280796.

The previous prime is 18420561583. The next prime is 18420561611. The reversal of 18420561596 is 69516502481.

It is a self number, because there is not a number n which added to its sum of digits gives 18420561596.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2302570196 + ... + 2302570203.

It is an arithmetic number, because the mean of its divisors is an integer number (5372663800).

Almost surely, 2^18420561596 is an apocalyptic number.

It is an amenable number.

18420561596 is a deficient number, since it is larger than the sum of its proper divisors (13815421204).

18420561596 is a wasteful number, since it uses less digits than its factorization.

18420561596 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4605140403 (or 4605140401 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 47.

The spelling of 18420561596 in words is "eighteen billion, four hundred twenty million, five hundred sixty-one thousand, five hundred ninety-six".