20067993 has 40 divisors (see below), whose sum is σ = 33175296. Its totient is φ = 11988000.

The previous prime is 20067977. The next prime is 20067997. The reversal of 20067993 is 39976002.

It is not a de Polignac number, because 20067993 - 2⁴ = 20067977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20067997) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 89880 + ... + 90102.

Almost surely, 2^20067993 is an apocalyptic number.

It is an amenable number.

20067993 is a deficient number, since it is larger than the sum of its proper divisors (13107303).

20067993 is a wasteful number, since it uses less digits than its factorization.

20067993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347 (or 338 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 20067993 is about 4479.7313535524. The cubic root of 20067993 is about 271.7490160646.

It can be divided in two parts, 2006 and 7993, that added together give a palindrome (9999).

The spelling of 20067993 in words is "twenty million, sixty-seven thousand, nine hundred ninety-three".