20635316 has 12 divisors (see below), whose sum is σ = 38889732. Its totient is φ = 9523968.

The previous prime is 20635291. The next prime is 20635319. The reversal of 20635316 is 61353602.

It can be written as a sum of positive squares in 2 ways, for example, as 2572816 + 18062500 = 1604^2 + 4250^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20635319) 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, 198365 + ... + 198468.

It is an arithmetic number, because the mean of its divisors is an integer number (3240811).

Almost surely, 2^20635316 is an apocalyptic number.

20635316 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20635316 is a deficient number, since it is larger than the sum of its proper divisors (18254416).

20635316 is a wasteful number, since it uses less digits than its factorization.

20635316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396850 (or 396848 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 20635316 is about 4542.6111433844. The cubic root of 20635316 is about 274.2860422346.

Adding to 20635316 its reverse (61353602), we get a palindrome (81988918).

The spelling of 20635316 in words is "twenty million, six hundred thirty-five thousand, three hundred sixteen".