20115220034 has 32 divisors (see below), whose sum is σ = 37328269440. Its totient is φ = 7916424192.

The previous prime is 20115219997. The next prime is 20115220039. The reversal of 20115220034 is 43002251102.

It is a super-2 number, since 2×20115220034² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20115219988 and 20115220015.

It is not an unprimeable number, because it can be changed into a prime (20115220039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 251204 + ... + 321455.

It is an arithmetic number, because the mean of its divisors is an integer number (1166508420).

Almost surely, 2^20115220034 is an apocalyptic number.

20115220034 is a deficient number, since it is larger than the sum of its proper divisors (17213049406).

20115220034 is a wasteful number, since it uses less digits than its factorization.

20115220034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572874.

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 20115220034 its reverse (43002251102), we get a palindrome (63117471136).

The spelling of 20115220034 in words is "twenty billion, one hundred fifteen million, two hundred twenty thousand, thirty-four".