20011223132 has 12 divisors (see below), whose sum is σ = 35023327080. Its totient is φ = 10004558256.

The previous prime is 20011223131. The next prime is 20011223143. The reversal of 20011223132 is 23132211002.

It is a self number, because there is not a number n which added to its sum of digits gives 20011223132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011223131) 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 3 ways as a sum of consecutive naturals, for example, 219782 + ... + 297197.

It is an arithmetic number, because the mean of its divisors is an integer number (2918610590).

Almost surely, 2^20011223132 is an apocalyptic number.

It is an amenable number.

20011223132 is a deficient number, since it is larger than the sum of its proper divisors (15012103948).

20011223132 is a wasteful number, since it uses less digits than its factorization.

20011223132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526660 (or 526658 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20011223132 its reverse (23132211002), we get a palindrome (43143434134).

The spelling of 20011223132 in words is "twenty billion, eleven million, two hundred twenty-three thousand, one hundred thirty-two".