20264436 has 18 divisors (see below), whose sum is σ = 51224082. Its totient is φ = 6754800.

The previous prime is 20264401. The next prime is 20264437. The reversal of 20264436 is 63446202.

It can be written as a sum of positive squares in only one way, i.e., 10304100 + 9960336 = 3210^2 + 3156^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20264437) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 281415 + ... + 281486.

Almost surely, 2^20264436 is an apocalyptic number.

It is an amenable number.

20264436 is an abundant number, since it is smaller than the sum of its proper divisors (30959646).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20264436 is a wasteful number, since it uses less digits than its factorization.

20264436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562911 (or 562906 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 20264436 is about 4501.6037142334. The cubic root of 20264436 is about 272.6328437936.

The spelling of 20264436 in words is "twenty million, two hundred sixty-four thousand, four hundred thirty-six".