20420133111 has 12 divisors (see below), whose sum is σ = 33709426192. Its totient is φ = 11668647456.

The previous prime is 20420133089. The next prime is 20420133119. The reversal of 20420133111 is 11133102402.

20420133111 is a `hidden beast` number, since 2 + 0 + 420 + 133 + 111 = 666.

It is not a de Polignac number, because 20420133111 - 2⁷ = 20420132983 is a prime.

It is a super-3 number, since 3×20420133111³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20420133119) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 162064486 + ... + 162064611.

Almost surely, 2^20420133111 is an apocalyptic number.

20420133111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20420133111 is a deficient number, since it is larger than the sum of its proper divisors (13289293081).

20420133111 is a wasteful number, since it uses less digits than its factorization.

20420133111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324129110 (or 324129107 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 20420133111 its reverse (11133102402), we get a palindrome (31553235513).

The spelling of 20420133111 in words is "twenty billion, four hundred twenty million, one hundred thirty-three thousand, one hundred eleven".