20334430011 has 16 divisors (see below), whose sum is σ = 31065465600. Its totient is φ = 11589799008.

The previous prime is 20334430007. The next prime is 20334430027. The reversal of 20334430011 is 11003443302.

It is not a de Polignac number, because 20334430011 - 2² = 20334430007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 20334430011.

It is not an unprimeable number, because it can be changed into a prime (20334430001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1236441 + ... + 1252778.

It is an arithmetic number, because the mean of its divisors is an integer number (1941591600).

Almost surely, 2^20334430011 is an apocalyptic number.

20334430011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20334430011 is a deficient number, since it is larger than the sum of its proper divisors (10731035589).

20334430011 is a wasteful number, since it uses less digits than its factorization.

20334430011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2489618.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 20334430011 its reverse (11003443302), we get a palindrome (31337873313).

The spelling of 20334430011 in words is "twenty billion, three hundred thirty-four million, four hundred thirty thousand, eleven".