18860401 has 4 divisors (see below), whose sum is σ = 21554752. Its totient is φ = 16166052.

The previous prime is 18860393. The next prime is 18860423. The reversal of 18860401 is 10406881.

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 not a de Polignac number, because 18860401 - 2³ = 18860393 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18860401.

It is not an unprimeable number, because it can be changed into a prime (18860801) 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, 1347165 + ... + 1347178.

It is an arithmetic number, because the mean of its divisors is an integer number (5388688).

Almost surely, 2^18860401 is an apocalyptic number.

It is an amenable number.

18860401 is a deficient number, since it is larger than the sum of its proper divisors (2694351).

18860401 is an equidigital number, since it uses as much as digits as its factorization.

18860401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2694350.

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 18860401 is about 4342.8563181390. The cubic root of 18860401 is about 266.1850381162.

The spelling of 18860401 in words is "eighteen million, eight hundred sixty thousand, four hundred one".