20234430091 has 2 divisors, whose sum is σ = 20234430092. Its totient is φ = 20234430090.

The previous prime is 20234430077. The next prime is 20234430173. The reversal of 20234430091 is 19003443202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20234430091 - 2⁵ = 20234430059 is a prime.

It is a super-2 number, since 2×20234430091² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20234430001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10117215045 + 10117215046.

It is an arithmetic number, because the mean of its divisors is an integer number (10117215046).

Almost surely, 2^20234430091 is an apocalyptic number.

20234430091 is a deficient number, since it is larger than the sum of its proper divisors (1).

20234430091 is an equidigital number, since it uses as much as digits as its factorization.

20234430091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 20234430091 its reverse (19003443202), we get a palindrome (39237873293).

The spelling of 20234430091 in words is "twenty billion, two hundred thirty-four million, four hundred thirty thousand, ninety-one".