20431023211 has 8 divisors (see below), whose sum is σ = 21680674560. Its totient is φ = 19211484072.

The previous prime is 20431023169. The next prime is 20431023233. The reversal of 20431023211 is 11232013402.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20431023211 - 2⁷ = 20431023083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20431023271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7526655 + ... + 7529368.

It is an arithmetic number, because the mean of its divisors is an integer number (2710084320).

Almost surely, 2^20431023211 is an apocalyptic number.

20431023211 is a deficient number, since it is larger than the sum of its proper divisors (1249651349).

20431023211 is a wasteful number, since it uses less digits than its factorization.

20431023211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15056105.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 20431023211 its reverse (11232013402), we get a palindrome (31663036613).

The spelling of 20431023211 in words is "twenty billion, four hundred thirty-one million, twenty-three thousand, two hundred eleven".