20840694 has 32 divisors (see below), whose sum is σ = 48926976. Its totient is φ = 5793120.

The previous prime is 20840683. The next prime is 20840707. The reversal of 20840694 is 49604802.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5152 + ... + 8259.

It is an arithmetic number, because the mean of its divisors is an integer number (1528968).

Almost surely, 2^20840694 is an apocalyptic number.

20840694 is an abundant number, since it is smaller than the sum of its proper divisors (28086282).

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

20840694 is a wasteful number, since it uses less digits than its factorization.

20840694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13460.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 20840694 is about 4565.1608953026. The cubic root of 20840694 is about 275.1930061066.

The spelling of 20840694 in words is "twenty million, eight hundred forty thousand, six hundred ninety-four".