20056436 has 24 divisors (see below), whose sum is σ = 35768040. Its totient is φ = 9839232.

The previous prime is 20056433. The next prime is 20056453. The reversal of 20056436 is 63465002.

It can be written as a sum of positive squares in 4 ways, for example, as 7595536 + 12460900 = 2756^2 + 3530^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20056433) 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, 68306 + ... + 68598.

It is an arithmetic number, because the mean of its divisors is an integer number (1490335).

Almost surely, 2^20056436 is an apocalyptic number.

It is an amenable number.

20056436 is a deficient number, since it is larger than the sum of its proper divisors (15711604).

20056436 is a wasteful number, since it uses less digits than its factorization.

20056436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563 (or 561 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 20056436 is about 4478.4412466839. The cubic root of 20056436 is about 271.6968400041.

The spelling of 20056436 in words is "twenty million, fifty-six thousand, four hundred thirty-six".