20494826893 has 2 divisors, whose sum is σ = 20494826894. Its totient is φ = 20494826892.

The previous prime is 20494826839. The next prime is 20494826921. The reversal of 20494826893 is 39862849402.

Together with previous prime (20494826839) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13496165929 + 6998660964 = 116173^2 + 83658^2 .

It is a cyclic number.

It is not a de Polignac number, because 20494826893 - 2²⁹ = 19957955981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20494826393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10247413446 + 10247413447.

It is an arithmetic number, because the mean of its divisors is an integer number (10247413447).

Almost surely, 2^20494826893 is an apocalyptic number.

It is an amenable number.

20494826893 is a deficient number, since it is larger than the sum of its proper divisors (1).

20494826893 is an equidigital number, since it uses as much as digits as its factorization.

20494826893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5971968, while the sum is 55.

The spelling of 20494826893 in words is "twenty billion, four hundred ninety-four million, eight hundred twenty-six thousand, eight hundred ninety-three".