20830136 has 16 divisors (see below), whose sum is σ = 39106800. Its totient is φ = 10401664.

The previous prime is 20830133. The next prime is 20830141. The reversal of 20830136 is 63103802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20830133) 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, 8720 + ... + 10848.

It is an arithmetic number, because the mean of its divisors is an integer number (2444175).

Almost surely, 2^20830136 is an apocalyptic number.

It is an amenable number.

20830136 is a deficient number, since it is larger than the sum of its proper divisors (18276664).

20830136 is a wasteful number, since it uses less digits than its factorization.

20830136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3358 (or 3354 counting only the distinct ones).

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

The square root of 20830136 is about 4564.0043821188. The cubic root of 20830136 is about 275.1465268716.

Adding to 20830136 its reverse (63103802), we get a palindrome (83933938).

The spelling of 20830136 in words is "twenty million, eight hundred thirty thousand, one hundred thirty-six".