20011232311 has 16 divisors (see below), whose sum is σ = 23298612480. Its totient is φ = 16832036160.

The previous prime is 20011232249. The next prime is 20011232357. The reversal of 20011232311 is 11323211002.

It is a cyclic number.

It is not a de Polignac number, because 20011232311 - 2¹⁷ = 20011101239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011232711) 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, 193395 + ... + 278251.

It is an arithmetic number, because the mean of its divisors is an integer number (1456163280).

Almost surely, 2^20011232311 is an apocalyptic number.

20011232311 is a deficient number, since it is larger than the sum of its proper divisors (3287380169).

20011232311 is an equidigital number, since it uses as much as digits as its factorization.

20011232311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85494.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 20011232311 its reverse (11323211002), we get a palindrome (31334443313).

The spelling of 20011232311 in words is "twenty billion, eleven million, two hundred thirty-two thousand, three hundred eleven".