20235440611 has 4 divisors (see below), whose sum is σ = 20314177992. Its totient is φ = 20156703232.

The previous prime is 20235440609. The next prime is 20235440633. The reversal of 20235440611 is 11604453202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20235440611 - 2¹ = 20235440609 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20235440611.

It is not an unprimeable number, because it can be changed into a prime (20235440011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39368305 + ... + 39368818.

It is an arithmetic number, because the mean of its divisors is an integer number (5078544498).

Almost surely, 2^20235440611 is an apocalyptic number.

20235440611 is a deficient number, since it is larger than the sum of its proper divisors (78737381).

20235440611 is an equidigital number, since it uses as much as digits as its factorization.

20235440611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78737380.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 20235440611 its reverse (11604453202), we get a palindrome (31839893813).

The spelling of 20235440611 in words is "twenty billion, two hundred thirty-five million, four hundred forty thousand, six hundred eleven".