18975401 has 4 divisors (see below), whose sum is σ = 19235412. Its totient is φ = 18715392.

The previous prime is 18975343. The next prime is 18975419. The reversal of 18975401 is 10457981.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5285401 + 13690000 = 2299^2 + 3700^2 .

It is a cyclic number.

It is not a de Polignac number, because 18975401 - 2⁶ = 18975337 is a prime.

It is a super-2 number, since 2×18975401² = 720131686221602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18975101) 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, 129896 + ... + 130041.

It is an arithmetic number, because the mean of its divisors is an integer number (4808853).

Almost surely, 2^18975401 is an apocalyptic number.

It is an amenable number.

18975401 is a deficient number, since it is larger than the sum of its proper divisors (260011).

18975401 is an equidigital number, since it uses as much as digits as its factorization.

18975401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260010.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 18975401 is about 4356.0763308280. The cubic root of 18975401 is about 266.7249572226.

The spelling of 18975401 in words is "eighteen million, nine hundred seventy-five thousand, four hundred one".