1813786494 has 32 divisors (see below), whose sum is σ = 3989744640. Its totient is φ = 546212832.

The previous prime is 1813786477. The next prime is 1813786529. The reversal of 1813786494 is 4946873181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 243714 + ... + 251045.

It is an arithmetic number, because the mean of its divisors is an integer number (124679520).

Almost surely, 2^1813786494 is an apocalyptic number.

1813786494 is an abundant number, since it is smaller than the sum of its proper divisors (2175958146).

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

1813786494 is a wasteful number, since it uses less digits than its factorization.

1813786494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494824.

The product of its digits is 1161216, while the sum is 51.

The square root of 1813786494 is about 42588.5723404765. The cubic root of 1813786494 is about 1219.5381423844.

The spelling of 1813786494 in words is "one billion, eight hundred thirteen million, seven hundred eighty-six thousand, four hundred ninety-four".