20342136 has 16 divisors (see below), whose sum is σ = 50855400. Its totient is φ = 6780704.

The previous prime is 20342131. The next prime is 20342167. The reversal of 20342136 is 63124302.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20342131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 423771 + ... + 423818.

Almost surely, 2^20342136 is an apocalyptic number.

It is an amenable number.

20342136 is an abundant number, since it is smaller than the sum of its proper divisors (30513264).

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

20342136 is a wasteful number, since it uses less digits than its factorization.

20342136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847598 (or 847594 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 20342136 is about 4510.2257149726. The cubic root of 20342136 is about 272.9808517477.

Adding to 20342136 its reverse (63124302), we get a palindrome (83466438).

The spelling of 20342136 in words is "twenty million, three hundred forty-two thousand, one hundred thirty-six".