20130836 has 24 divisors (see below), whose sum is σ = 39372480. Its totient is φ = 8926400.

The previous prime is 20130833. The next prime is 20130841. The reversal of 20130836 is 63803102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20130833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3776 + ... + 7383.

It is an arithmetic number, because the mean of its divisors is an integer number (1640520).

Almost surely, 2^20130836 is an apocalyptic number.

It is an amenable number.

20130836 is a deficient number, since it is larger than the sum of its proper divisors (19241644).

20130836 is a wasteful number, since it uses less digits than its factorization.

20130836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11215 (or 11213 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 20130836 is about 4486.7400192122. The cubic root of 20130836 is about 272.0323815255.

Adding to 20130836 its reverse (63803102), we get a palindrome (83933938).

The spelling of 20130836 in words is "twenty million, one hundred thirty thousand, eight hundred thirty-six".