20122111432 has 8 divisors (see below), whose sum is σ = 37728958950. Its totient is φ = 10061055712.

The previous prime is 20122111379. The next prime is 20122111511. The reversal of 20122111432 is 23411122102.

It can be written as a sum of positive squares in only one way, i.e., 14983228836 + 5138882596 = 122406^2 + 71686^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1257631957 + ... + 1257631972.

Almost surely, 2^20122111432 is an apocalyptic number.

It is an amenable number.

20122111432 is a deficient number, since it is larger than the sum of its proper divisors (17606847518).

20122111432 is a wasteful number, since it uses less digits than its factorization.

20122111432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2515263935 (or 2515263931 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 20122111432 its reverse (23411122102), we get a palindrome (43533233534).

The spelling of 20122111432 in words is "twenty billion, one hundred twenty-two million, one hundred eleven thousand, four hundred thirty-two".