20369983 has 4 divisors (see below), whose sum is σ = 20571768. Its totient is φ = 20168200.

The previous prime is 20369981. The next prime is 20370011. The reversal of 20369983 is 38996302.

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

It is a cyclic number.

It is not a de Polignac number, because 20369983 - 2¹ = 20369981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20369981) 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, 100741 + ... + 100942.

It is an arithmetic number, because the mean of its divisors is an integer number (5142942).

Almost surely, 2^20369983 is an apocalyptic number.

20369983 is a deficient number, since it is larger than the sum of its proper divisors (201785).

20369983 is a wasteful number, since it uses less digits than its factorization.

20369983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201784.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 20369983 is about 4513.3117552414. The cubic root of 20369983 is about 273.1053590213.

The spelling of 20369983 in words is "twenty million, three hundred sixty-nine thousand, nine hundred eighty-three".