20115396 has 36 divisors (see below), whose sum is σ = 58111872. Its totient is φ = 5747184.

The previous prime is 20115371. The next prime is 20115397. The reversal of 20115396 is 69351102.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (20115397) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39660 + ... + 40163.

Almost surely, 2^20115396 is an apocalyptic number.

It is an amenable number.

20115396 is an abundant number, since it is smaller than the sum of its proper divisors (37996476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20115396 is a wasteful number, since it uses less digits than its factorization.

20115396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79840 (or 79835 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 20115396 is about 4485.0190635046. The cubic root of 20115396 is about 271.9628157070.

Adding to 20115396 its reverse (69351102), we get a palindrome (89466498).

The spelling of 20115396 in words is "twenty million, one hundred fifteen thousand, three hundred ninety-six".