20022736 has 20 divisors (see below), whose sum is σ = 41076612. Its totient is φ = 9422336.

The previous prime is 20022733. The next prime is 20022791. The reversal of 20022736 is 63722002.

It can be written as a sum of positive squares in 2 ways, for example, as 13366336 + 6656400 = 3656^2 + 2580^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20022733) 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, 36535 + ... + 37078.

Almost surely, 2^20022736 is an apocalyptic number.

It is an amenable number.

20022736 is an abundant number, since it is smaller than the sum of its proper divisors (21053876).

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

20022736 is a wasteful number, since it uses less digits than its factorization.

20022736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73638 (or 73632 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 20022736 is about 4474.6771950611. The cubic root of 20022736 is about 271.5445810392.

Adding to 20022736 its reverse (63722002), we get a palindrome (83744738).

The spelling of 20022736 in words is "twenty million, twenty-two thousand, seven hundred thirty-six".