20011223133 has 48 divisors (see below), whose sum is σ = 33415986240. Its totient is φ = 11424134400.

The previous prime is 20011223131. The next prime is 20011223143. The reversal of 20011223133 is 33132211002.

It is not a de Polignac number, because 20011223133 - 2¹ = 20011223131 is a prime.

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 polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 32710 + ... + 202712.

It is an arithmetic number, because the mean of its divisors is an integer number (696166380).

Almost surely, 2^20011223133 is an apocalyptic number.

It is an amenable number.

20011223133 is a deficient number, since it is larger than the sum of its proper divisors (13404763107).

20011223133 is a wasteful number, since it uses less digits than its factorization.

20011223133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170090 (or 170087 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20011223133 its reverse (33132211002), we get a palindrome (53143434135).

The spelling of 20011223133 in words is "twenty billion, eleven million, two hundred twenty-three thousand, one hundred thirty-three".