20036497 has 8 divisors (see below), whose sum is σ = 21717416. Its totient is φ = 18375552.

The previous prime is 20036483. The next prime is 20036521. The reversal of 20036497 is 79463002.

It can be written as a sum of positive squares in 4 ways, for example, as 3682561 + 16353936 = 1919^2 + 4044^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-20036497 is a prime.

It is a super-2 number, since 2×20036497² = 802922424062018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20030497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2868 + ... + 6949.

It is an arithmetic number, because the mean of its divisors is an integer number (2714677).

Almost surely, 2^20036497 is an apocalyptic number.

It is an amenable number.

20036497 is a deficient number, since it is larger than the sum of its proper divisors (1680919).

20036497 is a wasteful number, since it uses less digits than its factorization.

20036497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9987.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 20036497 is about 4476.2145837750. The cubic root of 20036497 is about 271.6067748250.

Adding to 20036497 its reverse (79463002), we get a palindrome (99499499).

The spelling of 20036497 in words is "twenty million, thirty-six thousand, four hundred ninety-seven".