20093864 has 32 divisors (see below), whose sum is σ = 45593280. Its totient is φ = 8104704.

The previous prime is 20093791. The next prime is 20093867. The reversal of 20093864 is 46839002.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 20093864.

It is not an unprimeable number, because it can be changed into a prime (20093867) 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, 9602 + ... + 11505.

It is an arithmetic number, because the mean of its divisors is an integer number (1424790).

Almost surely, 2^20093864 is an apocalyptic number.

It is an amenable number.

20093864 is an abundant number, since it is smaller than the sum of its proper divisors (25499416).

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

20093864 is a wasteful number, since it uses less digits than its factorization.

20093864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21137 (or 21133 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 20093864 is about 4482.6179850619. The cubic root of 20093864 is about 271.8657425658.

The spelling of 20093864 in words is "twenty million, ninety-three thousand, eight hundred sixty-four".