20427372 has 72 divisors (see below), whose sum is σ = 59661056. Its totient is φ = 5772384.

The previous prime is 20427361. The next prime is 20427373. The reversal of 20427372 is 27372402.

It is not an unprimeable number, because it can be changed into a prime (20427373) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25563 + ... + 26349.

Almost surely, 2^20427372 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 20427372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29830528).

20427372 is an abundant number, since it is smaller than the sum of its proper divisors (39233684).

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

20427372 is a wasteful number, since it uses less digits than its factorization.

20427372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 907 (or 902 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 27.

The square root of 20427372 is about 4519.6650318359. The cubic root of 20427372 is about 273.3615946718.

Adding to 20427372 its reverse (27372402), we get a palindrome (47799774).

The spelling of 20427372 in words is "twenty million, four hundred twenty-seven thousand, three hundred seventy-two".