18720578902 has 8 divisors (see below), whose sum is σ = 28986702912. Its totient is φ = 9058344600.

The previous prime is 18720578893. The next prime is 18720578909. The reversal of 18720578902 is 20987502781.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18720578909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150972349 + ... + 150972472.

It is an arithmetic number, because the mean of its divisors is an integer number (3623337864).

Almost surely, 2^18720578902 is an apocalyptic number.

18720578902 is a deficient number, since it is larger than the sum of its proper divisors (10266124010).

18720578902 is a wasteful number, since it uses less digits than its factorization.

18720578902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301944854.

The product of its (nonzero) digits is 564480, while the sum is 49.

The spelling of 18720578902 in words is "eighteen billion, seven hundred twenty million, five hundred seventy-eight thousand, nine hundred two".