20293393 has 4 divisors (see below), whose sum is σ = 21487140. Its totient is φ = 19099648.

The previous prime is 20293391. The next prime is 20293397. The reversal of 20293393 is 39339202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15311569 + 4981824 = 3913^2 + 2232^2 .

It is a cyclic number.

It is not a de Polignac number, because 20293393 - 2¹ = 20293391 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20293391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 596848 + ... + 596881.

It is an arithmetic number, because the mean of its divisors is an integer number (5371785).

Almost surely, 2^20293393 is an apocalyptic number.

It is an amenable number.

20293393 is a deficient number, since it is larger than the sum of its proper divisors (1193747).

20293393 is a wasteful number, since it uses less digits than its factorization.

20293393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1193746.

The product of its (nonzero) digits is 8748, while the sum is 31.

The square root of 20293393 is about 4504.8188642830. The cubic root of 20293393 is about 272.7626421569.

The spelling of 20293393 in words is "twenty million, two hundred ninety-three thousand, three hundred ninety-three".