20110423011 has 16 divisors (see below), whose sum is σ = 30646514688. Its totient is φ = 11490897600.

The previous prime is 20110423007. The next prime is 20110423093. The reversal of 20110423011 is 11032401102.

It is not a de Polignac number, because 20110423011 - 2² = 20110423007 is a prime.

It is a super-2 number, since 2×20110423011² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20110421011) 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, 468991 + ... + 510071.

It is an arithmetic number, because the mean of its divisors is an integer number (1915407168).

Almost surely, 2^20110423011 is an apocalyptic number.

20110423011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20110423011 is a deficient number, since it is larger than the sum of its proper divisors (10536091677).

20110423011 is a wasteful number, since it uses less digits than its factorization.

20110423011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64402.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 20110423011 its reverse (11032401102), we get a palindrome (31142824113).

It can be divided in two parts, 201104 and 23011, that added together give a triangular number (224115 = T₆₆₉).

The spelling of 20110423011 in words is "twenty billion, one hundred ten million, four hundred twenty-three thousand, eleven".