20850042 has 16 divisors (see below), whose sum is σ = 43045632. Its totient is φ = 6725760.

The previous prime is 20850019. The next prime is 20850047. The reversal of 20850042 is 24005802.

It is not an unprimeable number, because it can be changed into a prime (20850047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55863 + ... + 56234.

It is an arithmetic number, because the mean of its divisors is an integer number (2690352).

Almost surely, 2^20850042 is an apocalyptic number.

20850042 is an abundant number, since it is smaller than the sum of its proper divisors (22195590).

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

20850042 is a wasteful number, since it uses less digits than its factorization.

20850042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112133.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 20850042 is about 4566.1846217603. The cubic root of 20850042 is about 275.2341454866.

Adding to 20850042 its reverse (24005802), we get a palindrome (44855844).

The spelling of 20850042 in words is "twenty million, eight hundred fifty thousand, forty-two".