20404454 has 16 divisors (see below), whose sum is σ = 37037088. Its totient is φ = 8230272.

The previous prime is 20404453. The next prime is 20404469. The reversal of 20404454 is 45440402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20404453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42629 + ... + 43104.

It is an arithmetic number, because the mean of its divisors is an integer number (2314818).

Almost surely, 2^20404454 is an apocalyptic number.

20404454 is a deficient number, since it is larger than the sum of its proper divisors (16632634).

20404454 is a wasteful number, since it uses less digits than its factorization.

20404454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85759.

The product of its (nonzero) digits is 2560, while the sum is 23.

The square root of 20404454 is about 4517.1289554318. The cubic root of 20404454 is about 273.2593259217.

Adding to 20404454 its reverse (45440402), we get a palindrome (65844856).

The spelling of 20404454 in words is "twenty million, four hundred four thousand, four hundred fifty-four".