20142836 has 48 divisors (see below), whose sum is σ = 41731200. Its totient is φ = 8329728.

The previous prime is 20142833. The next prime is 20142847. The reversal of 20142836 is 63824102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20142833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146960 + ... + 147096.

It is an arithmetic number, because the mean of its divisors is an integer number (869400).

Almost surely, 2^20142836 is an apocalyptic number.

It is an amenable number.

20142836 is an abundant number, since it is smaller than the sum of its proper divisors (21588364).

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

20142836 is a wasteful number, since it uses less digits than its factorization.

20142836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296 (or 294 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 20142836 is about 4488.0770938120. The cubic root of 20142836 is about 272.0864236619.

Adding to 20142836 its reverse (63824102), we get a palindrome (83966938).

The spelling of 20142836 in words is "twenty million, one hundred forty-two thousand, eight hundred thirty-six".