20342142 has 24 divisors (see below), whose sum is σ = 44908344. Its totient is φ = 6652464.

The previous prime is 20342131. The next prime is 20342167. The reversal of 20342142 is 24124302.

20342142 is a `hidden beast` number, since 203 + 421 + 42 = 666.

It is a super-2 number, since 2×20342142² = 827605482296328, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9708 + ... + 11615.

It is an arithmetic number, because the mean of its divisors is an integer number (1871181).

Almost surely, 2^20342142 is an apocalyptic number.

20342142 is an abundant number, since it is smaller than the sum of its proper divisors (24566202).

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

20342142 is a wasteful number, since it uses less digits than its factorization.

20342142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21384 (or 21381 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 20342142 is about 4510.2263801277. The cubic root of 20342142 is about 272.9808785867.

Adding to 20342142 its reverse (24124302), we get a palindrome (44466444).

The spelling of 20342142 in words is "twenty million, three hundred forty-two thousand, one hundred forty-two".