18800421451 has 8 divisors (see below), whose sum is σ = 21494022624. Its totient is φ = 16108776960.

The previous prime is 18800421433. The next prime is 18800421461. The reversal of 18800421451 is 15412400881.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 18800421451 - 2⁹ = 18800420939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18800421461) 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, 468520 + ... + 507061.

It is an arithmetic number, because the mean of its divisors is an integer number (2686752828).

Almost surely, 2^18800421451 is an apocalyptic number.

18800421451 is a deficient number, since it is larger than the sum of its proper divisors (2693601173).

18800421451 is an equidigital number, since it uses as much as digits as its factorization.

18800421451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978341.

The product of its (nonzero) digits is 10240, while the sum is 34.

The spelling of 18800421451 in words is "eighteen billion, eight hundred million, four hundred twenty-one thousand, four hundred fifty-one".