20264421 has 16 divisors (see below), whose sum is σ = 28060160. Its totient is φ = 12994560.

The previous prime is 20264401. The next prime is 20264437. The reversal of 20264421 is 12446202.

It is not a de Polignac number, because 20264421 - 2⁵ = 20264389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20264401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17385 + ... + 18513.

It is an arithmetic number, because the mean of its divisors is an integer number (1753760).

Almost surely, 2^20264421 is an apocalyptic number.

It is an amenable number.

20264421 is a deficient number, since it is larger than the sum of its proper divisors (7795739).

20264421 is a wasteful number, since it uses less digits than its factorization.

20264421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1356.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 20264421 is about 4501.6020481602. The cubic root of 20264421 is about 272.6327765248.

It can be divided in two parts, 202644 and 21, that multiplied together give a palindrome (4255524).

The spelling of 20264421 in words is "twenty million, two hundred sixty-four thousand, four hundred twenty-one".