20427442 has 16 divisors (see below), whose sum is σ = 35297280. Its totient is φ = 8684928.

The previous prime is 20427439. The next prime is 20427457. The reversal of 20427442 is 24472402.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3967 + ... + 7522.

It is an arithmetic number, because the mean of its divisors is an integer number (2206080).

Almost surely, 2^20427442 is an apocalyptic number.

20427442 is a deficient number, since it is larger than the sum of its proper divisors (14869838).

20427442 is a wasteful number, since it uses less digits than its factorization.

20427442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11625.

The product of its (nonzero) digits is 3584, while the sum is 25.

The square root of 20427442 is about 4519.6727757660. The cubic root of 20427442 is about 273.3619069210.

Adding to 20427442 its reverse (24472402), we get a palindrome (44899844).

The spelling of 20427442 in words is "twenty million, four hundred twenty-seven thousand, four hundred forty-two".