18721879001 has 8 divisors (see below), whose sum is σ = 21435987264. Its totient is φ = 16017659280.

The previous prime is 18721878991. The next prime is 18721879021. The reversal of 18721879001 is 10097812781.

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

It is not a de Polignac number, because 18721879001 - 2¹⁴ = 18721862617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18721879021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2468075 + ... + 2475648.

It is an arithmetic number, because the mean of its divisors is an integer number (2679498408).

Almost surely, 2^18721879001 is an apocalyptic number.

It is an amenable number.

18721879001 is a deficient number, since it is larger than the sum of its proper divisors (2714108263).

18721879001 is an equidigital number, since it uses as much as digits as its factorization.

18721879001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4944271.

The product of its (nonzero) digits is 56448, while the sum is 44.

The spelling of 18721879001 in words is "eighteen billion, seven hundred twenty-one million, eight hundred seventy-nine thousand, one".