20857294 has 12 divisors (see below), whose sum is σ = 31624776. Its totient is φ = 10316892.

The previous prime is 20857247. The next prime is 20857313. The reversal of 20857294 is 49275802.

It is a congruent number.

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, 20727 + ... + 21709.

It is an arithmetic number, because the mean of its divisors is an integer number (2635398).

Almost surely, 2^20857294 is an apocalyptic number.

20857294 is a deficient number, since it is larger than the sum of its proper divisors (10767482).

20857294 is an equidigital number, since it uses as much as digits as its factorization.

20857294 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1191 (or 1088 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 20857294 is about 4566.9786511434. The cubic root of 20857294 is about 275.2660521634.

The spelling of 20857294 in words is "twenty million, eight hundred fifty-seven thousand, two hundred ninety-four".