20342144 has 16 divisors (see below), whose sum is σ = 40525620. Its totient is φ = 10171008.

The previous prime is 20342131. The next prime is 20342167. The reversal of 20342144 is 44124302.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79334 + ... + 79589.

Almost surely, 2^20342144 is an apocalyptic number.

It is an amenable number.

20342144 is a deficient number, since it is larger than the sum of its proper divisors (20183476).

20342144 is an equidigital number, since it uses as much as digits as its factorization.

20342144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158937 (or 158925 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 20342144 is about 4510.2266018461. The cubic root of 20342144 is about 272.9808875330.

Adding to 20342144 its reverse (44124302), we get a palindrome (64466446).

The spelling of 20342144 in words is "twenty million, three hundred forty-two thousand, one hundred forty-four".