18773700494 has 24 divisors (see below), whose sum is σ = 28907611824. Its totient is φ = 9144115200.

The previous prime is 18773700493. The next prime is 18773700577. The reversal of 18773700494 is 49400737781.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18773700493) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2440334 + ... + 2448014.

It is an arithmetic number, because the mean of its divisors is an integer number (1204483826).

Almost surely, 2^18773700494 is an apocalyptic number.

18773700494 is a deficient number, since it is larger than the sum of its proper divisors (10133911330).

18773700494 is an equidigital number, since it uses as much as digits as its factorization.

18773700494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8492 (or 8451 counting only the distinct ones).

The product of its (nonzero) digits is 1185408, while the sum is 50.

The spelling of 18773700494 in words is "eighteen billion, seven hundred seventy-three million, seven hundred thousand, four hundred ninety-four".