18801878494 has 24 divisors (see below), whose sum is σ = 34233770448. Its totient is φ = 7707601440.

The previous prime is 18801878489. The next prime is 18801878497. The reversal of 18801878494 is 49487810881.

It is a super-3 number, since 3×18801878494³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18801878497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4168527 + ... + 4173034.

It is an arithmetic number, because the mean of its divisors is an integer number (1426407102).

Almost surely, 2^18801878494 is an apocalyptic number.

18801878494 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18801878494 is a deficient number, since it is larger than the sum of its proper divisors (15431891954).

18801878494 is a wasteful number, since it uses less digits than its factorization.

18801878494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8341600 (or 8341593 counting only the distinct ones).

The product of its (nonzero) digits is 4128768, while the sum is 58.

The spelling of 18801878494 in words is "eighteen billion, eight hundred one million, eight hundred seventy-eight thousand, four hundred ninety-four".