18978483136 has 14 divisors (see below), whose sum is σ = 37660427600. Its totient is φ = 9489241536.

The previous prime is 18978483119. The next prime is 18978483157. The reversal of 18978483136 is 63138487981.

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, 148269336 + ... + 148269463.

Almost surely, 2^18978483136 is an apocalyptic number.

18978483136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18978483136 is a deficient number, since it is larger than the sum of its proper divisors (18681944464).

18978483136 is an equidigital number, since it uses as much as digits as its factorization.

18978483136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296538811 (or 296538801 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 58.

The spelling of 18978483136 in words is "eighteen billion, nine hundred seventy-eight million, four hundred eighty-three thousand, one hundred thirty-six".