20368872 has 48 divisors (see below), whose sum is σ = 55731780. Its totient is φ = 6720000.

The previous prime is 20368853. The next prime is 20368877. The reversal of 20368872 is 27886302.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18610596 + 1758276 = 4314^2 + 1326^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (20368877) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5872 + ... + 8672.

Almost surely, 2^20368872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20368872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27865890).

20368872 is an abundant number, since it is smaller than the sum of its proper divisors (35362908).

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

20368872 is a wasteful number, since it uses less digits than its factorization.

20368872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2914 (or 2907 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 20368872 is about 4513.1886732110. The cubic root of 20368872 is about 273.1003937812.

The spelling of 20368872 in words is "twenty million, three hundred sixty-eight thousand, eight hundred seventy-two".