20363866 has 4 divisors (see below), whose sum is σ = 30545802. Its totient is φ = 10181932.

The previous prime is 20363857. The next prime is 20363867. The reversal of 20363866 is 66836302.

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

It can be written as a sum of positive squares in only one way, i.e., 11189025 + 9174841 = 3345^2 + 3029^2 .

It is a super-3 number, since 3×20363866³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (20363867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5090965 + ... + 5090968.

Almost surely, 2^20363866 is an apocalyptic number.

20363866 is a deficient number, since it is larger than the sum of its proper divisors (10181936).

20363866 is a wasteful number, since it uses less digits than its factorization.

20363866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10181935.

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 20363866 is about 4512.6340423305. The cubic root of 20363866 is about 273.0780189113.

The spelling of 20363866 in words is "twenty million, three hundred sixty-three thousand, eight hundred sixty-six".