20236872 has 64 divisors (see below), whose sum is σ = 53746560. Its totient is φ = 6336000.

The previous prime is 20236861. The next prime is 20236897. The reversal of 20236872 is 27863202.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33372 + ... + 33972.

It is an arithmetic number, because the mean of its divisors is an integer number (839790).

Almost surely, 2^20236872 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 20236872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26873280).

20236872 is an abundant number, since it is smaller than the sum of its proper divisors (33509688).

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

20236872 is a wasteful number, since it uses less digits than its factorization.

20236872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694 (or 690 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 20236872 is about 4498.5410968446. The cubic root of 20236872 is about 272.5091745642.

The spelling of 20236872 in words is "twenty million, two hundred thirty-six thousand, eight hundred seventy-two".