20115802 has 16 divisors (see below), whose sum is σ = 34735680. Its totient is φ = 8558208.

The previous prime is 20115773. The next prime is 20115803. The reversal of 20115802 is 20851102.

It is a self number, because there is not a number n which added to its sum of digits gives 20115802.

It is not an unprimeable number, because it can be changed into a prime (20115803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3223 + ... + 7114.

It is an arithmetic number, because the mean of its divisors is an integer number (2170980).

Almost surely, 2^20115802 is an apocalyptic number.

20115802 is a deficient number, since it is larger than the sum of its proper divisors (14619878).

20115802 is a wasteful number, since it uses less digits than its factorization.

20115802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10485.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 20115802 is about 4485.0643250683. The cubic root of 20115802 is about 271.9646454192.

Adding to 20115802 its reverse (20851102), we get a palindrome (40966904).

The spelling of 20115802 in words is "twenty million, one hundred fifteen thousand, eight hundred two".