20234404991 has 2 divisors, whose sum is σ = 20234404992. Its totient is φ = 20234404990.

The previous prime is 20234404889. The next prime is 20234405021. The reversal of 20234404991 is 19940443202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20234404991 - 2¹⁰ = 20234403967 is a prime.

It is a super-2 number, since 2×20234404991² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20234409991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10117202495 + 10117202496.

It is an arithmetic number, because the mean of its divisors is an integer number (10117202496).

Almost surely, 2^20234404991 is an apocalyptic number.

20234404991 is a deficient number, since it is larger than the sum of its proper divisors (1).

20234404991 is an equidigital number, since it uses as much as digits as its factorization.

20234404991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 38.

The spelling of 20234404991 in words is "twenty billion, two hundred thirty-four million, four hundred four thousand, nine hundred ninety-one".