20115142210 has 16 divisors (see below), whose sum is σ = 36261067896. Its totient is φ = 8034098688.

The previous prime is 20115142199. The next prime is 20115142211. The reversal of 20115142210 is 1224151102.

It can be written as a sum of positive squares in 4 ways, for example, as 19187513361 + 927628849 = 138519^2 + 30457^2 .

It is a super-2 number, since 2×20115142210² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20115142211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1487709 + ... + 1501168.

Almost surely, 2^20115142210 is an apocalyptic number.

20115142210 is a deficient number, since it is larger than the sum of its proper divisors (16145925686).

20115142210 is a wasteful number, since it uses less digits than its factorization.

20115142210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2989557.

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

Adding to 20115142210 its reverse (1224151102), we get a palindrome (21339293312).

The spelling of 20115142210 in words is "twenty billion, one hundred fifteen million, one hundred forty-two thousand, two hundred ten".