20840674 has 16 divisors (see below), whose sum is σ = 33523200. Its totient is φ = 9681984.

The previous prime is 20840653. The next prime is 20840683. The reversal of 20840674 is 47604802.

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, 1194 + ... + 6565.

It is an arithmetic number, because the mean of its divisors is an integer number (2095200).

Almost surely, 2^20840674 is an apocalyptic number.

20840674 is a deficient number, since it is larger than the sum of its proper divisors (12682526).

20840674 is a wasteful number, since it uses less digits than its factorization.

20840674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7857.

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 20840674 is about 4565.1587047988. The cubic root of 20840674 is about 275.1929180759.

The spelling of 20840674 in words is "twenty million, eight hundred forty thousand, six hundred seventy-four".