20813116 has 6 divisors (see below), whose sum is σ = 36422960. Its totient is φ = 10406556.

The previous prime is 20813101. The next prime is 20813119. The reversal of 20813116 is 61131802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20813119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2601636 + ... + 2601643.

Almost surely, 2^20813116 is an apocalyptic number.

It is an amenable number.

20813116 is a deficient number, since it is larger than the sum of its proper divisors (15609844).

20813116 is a wasteful number, since it uses less digits than its factorization.

20813116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5203283 (or 5203281 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 20813116 is about 4562.1394104082. The cubic root of 20813116 is about 275.0715670484.

Adding to 20813116 its reverse (61131802), we get a palindrome (81944918).

The spelling of 20813116 in words is "twenty million, eight hundred thirteen thousand, one hundred sixteen".