18978924201 has 8 divisors (see below), whose sum is σ = 25305984000. Its totient is φ = 12652240272.

The previous prime is 18978924157. The next prime is 18978924203. The reversal of 18978924201 is 10242987981.

It is a happy number.

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

It is not a de Polignac number, because 18978924201 - 2¹¹ = 18978922153 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18978924203) 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 7 ways as a sum of consecutive naturals, for example, 59800 + ... + 203798.

It is an arithmetic number, because the mean of its divisors is an integer number (3163248000).

Almost surely, 2^18978924201 is an apocalyptic number.

It is an amenable number.

18978924201 is a deficient number, since it is larger than the sum of its proper divisors (6327059799).

18978924201 is a wasteful number, since it uses less digits than its factorization.

18978924201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187935.

The product of its (nonzero) digits is 580608, while the sum is 51.

The spelling of 18978924201 in words is "eighteen billion, nine hundred seventy-eight million, nine hundred twenty-four thousand, two hundred one".