20492490841 has 2 divisors, whose sum is σ = 20492490842. Its totient is φ = 20492490840.

The previous prime is 20492490839. The next prime is 20492490847. The reversal of 20492490841 is 14809429402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18226350025 + 2266140816 = 135005^2 + 47604^2 .

It is a cyclic number.

It is not a de Polignac number, because 20492490841 - 2¹ = 20492490839 is a prime.

Together with 20492490839, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20492490847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10246245420 + 10246245421.

It is an arithmetic number, because the mean of its divisors is an integer number (10246245421).

Almost surely, 2^20492490841 is an apocalyptic number.

It is an amenable number.

20492490841 is a deficient number, since it is larger than the sum of its proper divisors (1).

20492490841 is an equidigital number, since it uses as much as digits as its factorization.

20492490841 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 43.

The spelling of 20492490841 in words is "twenty billion, four hundred ninety-two million, four hundred ninety thousand, eight hundred forty-one".