20026405 has 8 divisors (see below), whose sum is σ = 27464832. Its totient is φ = 13732368.

The previous prime is 20026397. The next prime is 20026427. The reversal of 20026405 is 50462002.

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 20026405 - 2³ = 20026397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 286057 + ... + 286126.

It is an arithmetic number, because the mean of its divisors is an integer number (3433104).

Almost surely, 2^20026405 is an apocalyptic number.

It is an amenable number.

20026405 is a deficient number, since it is larger than the sum of its proper divisors (7438427).

20026405 is an equidigital number, since it uses as much as digits as its factorization.

20026405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572195.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 20026405 is about 4475.0871499894. The cubic root of 20026405 is about 271.5611661223.

Adding to 20026405 its reverse (50462002), we get a palindrome (70488407).

The spelling of 20026405 in words is "twenty million, twenty-six thousand, four hundred five".