20874842 has 12 divisors (see below), whose sum is σ = 32357898. Its totient is φ = 10099800.

The previous prime is 20874839. The next prime is 20874851. The reversal of 20874842 is 24847802.

It can be written as a sum of positive squares in only one way, i.e., 18567481 + 2307361 = 4309^2 + 1519^2 .

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 3509 + ... + 7352.

Almost surely, 2^20874842 is an apocalyptic number.

20874842 is a deficient number, since it is larger than the sum of its proper divisors (11483056).

20874842 is a wasteful number, since it uses less digits than its factorization.

20874842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10925 (or 10894 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 35.

The square root of 20874842 is about 4568.8994298408. The cubic root of 20874842 is about 275.3432276375.

The spelling of 20874842 in words is "twenty million, eight hundred seventy-four thousand, eight hundred forty-two".