20111434212 has 24 divisors (see below), whose sum is σ = 48194969536. Its totient is φ = 6522627168.

The previous prime is 20111434193. The next prime is 20111434261. The reversal of 20111434212 is 21243411102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22647568 + ... + 22648455.

Almost surely, 2^20111434212 is an apocalyptic number.

It is an amenable number.

20111434212 is an abundant number, since it is smaller than the sum of its proper divisors (28083535324).

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

20111434212 is a wasteful number, since it uses less digits than its factorization.

20111434212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45296067 (or 45296065 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 20111434212 its reverse (21243411102), we get a palindrome (41354845314).

The spelling of 20111434212 in words is "twenty billion, one hundred eleven million, four hundred thirty-four thousand, two hundred twelve".