18781474862 has 4 divisors (see below), whose sum is σ = 28172212296. Its totient is φ = 9390737430.

The previous prime is 18781474861. The next prime is 18781474879. The reversal of 18781474862 is 26847418781.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 18781474798 and 18781474807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18781474861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4695368714 + ... + 4695368717.

It is an arithmetic number, because the mean of its divisors is an integer number (7043053074).

Almost surely, 2^18781474862 is an apocalyptic number.

18781474862 is a deficient number, since it is larger than the sum of its proper divisors (9390737434).

18781474862 is an equidigital number, since it uses as much as digits as its factorization.

18781474862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9390737433.

The product of its digits is 4816896, while the sum is 56.

The spelling of 18781474862 in words is "eighteen billion, seven hundred eighty-one million, four hundred seventy-four thousand, eight hundred sixty-two".