20604401 has 4 divisors (see below), whose sum is σ = 20680704. Its totient is φ = 20528100.

The previous prime is 20604359. The next prime is 20604407. The reversal of 20604401 is 10440602.

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 20604401 - 2¹⁴ = 20588017 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 20604401.

It is not an unprimeable number, because it can be changed into a prime (20604407) 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, 37745 + ... + 38286.

It is an arithmetic number, because the mean of its divisors is an integer number (5170176).

Almost surely, 2^20604401 is an apocalyptic number.

It is an amenable number.

20604401 is a deficient number, since it is larger than the sum of its proper divisors (76303).

20604401 is an equidigital number, since it uses as much as digits as its factorization.

20604401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76302.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 20604401 is about 4539.2070893494. The cubic root of 20604401 is about 274.1489990042.

The spelling of 20604401 in words is "twenty million, six hundred four thousand, four hundred one".