20113816 has 8 divisors (see below), whose sum is σ = 37713420. Its totient is φ = 10056904.

The previous prime is 20113813. The next prime is 20113817. The reversal of 20113816 is 61831102.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20113813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1257106 + ... + 1257121.

Almost surely, 2^20113816 is an apocalyptic number.

It is an amenable number.

20113816 is a deficient number, since it is larger than the sum of its proper divisors (17599604).

20113816 is a wasteful number, since it uses less digits than its factorization.

20113816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2514233 (or 2514229 counting only the distinct ones).

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

The square root of 20113816 is about 4484.8429180965. The cubic root of 20113816 is about 271.9556949175.

Adding to 20113816 its reverse (61831102), we get a palindrome (81944918).

The spelling of 20113816 in words is "twenty million, one hundred thirteen thousand, eight hundred sixteen".