20680894 has 16 divisors (see below), whose sum is σ = 33551280. Its totient is φ = 9504000.

The previous prime is 20680867. The next prime is 20680901. The reversal of 20680894 is 49808602.

It is a congruent number.

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, 4942 + ... + 8110.

It is an arithmetic number, because the mean of its divisors is an integer number (2096955).

Almost surely, 2^20680894 is an apocalyptic number.

20680894 is a deficient number, since it is larger than the sum of its proper divisors (12870386).

20680894 is a wasteful number, since it uses less digits than its factorization.

20680894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3435.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 20680894 is about 4547.6250944861. The cubic root of 20680894 is about 274.4878357101.

The spelling of 20680894 in words is "twenty million, six hundred eighty thousand, eight hundred ninety-four".