18878732006 has 8 divisors (see below), whose sum is σ = 29808524280. Its totient is φ = 8942557248.

The previous prime is 18878731981. The next prime is 18878732009. The reversal of 18878732006 is 60023787881.

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 (18878732009) 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, 248404331 + ... + 248404406.

It is an arithmetic number, because the mean of its divisors is an integer number (3726065535).

Almost surely, 2^18878732006 is an apocalyptic number.

18878732006 is a deficient number, since it is larger than the sum of its proper divisors (10929792274).

18878732006 is a wasteful number, since it uses less digits than its factorization.

18878732006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496808758.

The product of its (nonzero) digits is 903168, while the sum is 50.

The spelling of 18878732006 in words is "eighteen billion, eight hundred seventy-eight million, seven hundred thirty-two thousand, six".