20442270 has 16 divisors (see below), whose sum is σ = 49061520. Its totient is φ = 5451264.

The previous prime is 20442269. The next prime is 20442281. The reversal of 20442270 is 7224402.

It is a congruent 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, 340675 + ... + 340734.

It is an arithmetic number, because the mean of its divisors is an integer number (3066345).

Almost surely, 2^20442270 is an apocalyptic number.

20442270 is an abundant number, since it is smaller than the sum of its proper divisors (28619250).

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

20442270 is a wasteful number, since it uses less digits than its factorization.

20442270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681419.

The product of its (nonzero) digits is 896, while the sum is 21.

The square root of 20442270 is about 4521.3128624328. The cubic root of 20442270 is about 273.4280341431.

Adding to 20442270 its reverse (7224402), we get a palindrome (27666672).

The spelling of 20442270 in words is "twenty million, four hundred forty-two thousand, two hundred seventy".