18862800421 has 4 divisors (see below), whose sum is σ = 18863710272. Its totient is φ = 18861890572.

The previous prime is 18862800419. The next prime is 18862800431. The reversal of 18862800421 is 12400826881.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18862800421 - 2¹ = 18862800419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18862800401) 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, 423085 + ... + 465538.

It is an arithmetic number, because the mean of its divisors is an integer number (4715927568).

Almost surely, 2^18862800421 is an apocalyptic number.

It is an amenable number.

18862800421 is a deficient number, since it is larger than the sum of its proper divisors (909851).

18862800421 is an equidigital number, since it uses as much as digits as its factorization.

18862800421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909850.

The product of its (nonzero) digits is 49152, while the sum is 40.

The spelling of 18862800421 in words is "eighteen billion, eight hundred sixty-two million, eight hundred thousand, four hundred twenty-one".