18220465786 has 16 divisors (see below), whose sum is σ = 27804358080. Its totient is φ = 8952462400.

The previous prime is 18220465771. The next prime is 18220465799. The reversal of 18220465786 is 68756402281.

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, 302955 + ... + 358081.

It is an arithmetic number, because the mean of its divisors is an integer number (1737772380).

Almost surely, 2^18220465786 is an apocalyptic number.

18220465786 is a deficient number, since it is larger than the sum of its proper divisors (9583892294).

18220465786 is a wasteful number, since it uses less digits than its factorization.

18220465786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57989.

The product of its (nonzero) digits is 1290240, while the sum is 49.

The spelling of 18220465786 in words is "eighteen billion, two hundred twenty million, four hundred sixty-five thousand, seven hundred eighty-six".