20136042 has 24 divisors (see below), whose sum is σ = 43902144. Its totient is φ = 6669864.

The previous prime is 20136037. The next prime is 20136047. The reversal of 20136042 is 24063102.

It is a happy number.

20136042 is nontrivially palindromic in base 13.

It is an interprime number because it is at equal distance from previous prime (20136037) and next prime (20136047).

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

It is not an unprimeable number, because it can be changed into a prime (20136047) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 498 + ... + 6365.

It is an arithmetic number, because the mean of its divisors is an integer number (1829256).

Almost surely, 2^20136042 is an apocalyptic number.

20136042 is an abundant number, since it is smaller than the sum of its proper divisors (23766102).

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

20136042 is a wasteful number, since it uses less digits than its factorization.

20136042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7034 (or 7031 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 20136042 is about 4487.3201356712. The cubic root of 20136042 is about 272.0558294425.

Adding to 20136042 its reverse (24063102), we get a palindrome (44199144).

The spelling of 20136042 in words is "twenty million, one hundred thirty-six thousand, forty-two".