20369984 has 14 divisors (see below), whose sum is σ = 40421814. Its totient is φ = 10184960.

The previous prime is 20369981. The next prime is 20370011. The reversal of 20369984 is 48996302.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18731584 + 1638400 = 4328^2 + 1280^2 .

It is a super-3 number, since 3×20369984³ (a number of 23 digits) contains 333 as substring.

It is a zygodrome in base 8.

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 as a sum of consecutive naturals, namely, 159077 + ... + 159204.

Almost surely, 2^20369984 is an apocalyptic number.

It is an amenable number.

20369984 is a deficient number, since it is larger than the sum of its proper divisors (20051830).

20369984 is an equidigital number, since it uses as much as digits as its factorization.

20369984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318293 (or 318283 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 20369984 is about 4513.3118660248. The cubic root of 20369984 is about 273.1053634904.

The spelling of 20369984 in words is "twenty million, three hundred sixty-nine thousand, nine hundred eighty-four".