20242872 has 128 divisors (see below), whose sum is σ = 61992000. Its totient is φ = 6158592.

The previous prime is 20242861. The next prime is 20242879. The reversal of 20242872 is 27824202.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20242879) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 227404 + ... + 227492.

Almost surely, 2^20242872 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 20242872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30996000).

20242872 is an abundant number, since it is smaller than the sum of its proper divisors (41749128).

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

20242872 is an equidigital number, since it uses as much as digits as its factorization.

20242872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129 (or 107 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 20242872 is about 4499.2079302917. The cubic root of 20242872 is about 272.5361038492.

It can be divided in two parts, 202428 and 72, that added together give a square (202500 = 450²).

The spelling of 20242872 in words is "twenty million, two hundred forty-two thousand, eight hundred seventy-two".