20443694 has 16 divisors (see below), whose sum is σ = 31881600. Its totient is φ = 9821280.

The previous prime is 20443693. The next prime is 20443697. The reversal of 20443694 is 49634402.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20443694.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20443691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8132 + ... + 10344.

It is an arithmetic number, because the mean of its divisors is an integer number (1992600).

Almost surely, 2^20443694 is an apocalyptic number.

20443694 is a deficient number, since it is larger than the sum of its proper divisors (11437906).

20443694 is a wasteful number, since it uses less digits than its factorization.

20443694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2395.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 20443694 is about 4521.4703360743. The cubic root of 20443694 is about 273.4343829566.

The spelling of 20443694 in words is "twenty million, four hundred forty-three thousand, six hundred ninety-four".