20849842 has 16 divisors (see below), whose sum is σ = 33792192. Its totient is φ = 9591120.

The previous prime is 20849839. The next prime is 20849903. The reversal of 20849842 is 24894802.

It is a super-2 number, since 2×20849842² = 869431822849928, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7867 + ... + 10177.

It is an arithmetic number, because the mean of its divisors is an integer number (2112012).

Almost surely, 2^20849842 is an apocalyptic number.

20849842 is a deficient number, since it is larger than the sum of its proper divisors (12942350).

20849842 is a wasteful number, since it uses less digits than its factorization.

20849842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2673.

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 20849842 is about 4566.1627215858. The cubic root of 20849842 is about 275.2332654403.

The spelling of 20849842 in words is "twenty million, eight hundred forty-nine thousand, eight hundred forty-two".