20826923137 has 2 divisors, whose sum is σ = 20826923138. Its totient is φ = 20826923136.

The previous prime is 20826923129. The next prime is 20826923189. The reversal of 20826923137 is 73132962802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20288868721 + 538054416 = 142439^2 + 23196^2 .

It is a cyclic number.

It is not a de Polignac number, because 20826923137 - 2³ = 20826923129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20826923093 and 20826923102.

It is not a weakly prime, because it can be changed into another prime (20826923837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10413461568 + 10413461569.

It is an arithmetic number, because the mean of its divisors is an integer number (10413461569).

Almost surely, 2^20826923137 is an apocalyptic number.

It is an amenable number.

20826923137 is a deficient number, since it is larger than the sum of its proper divisors (1).

20826923137 is an equidigital number, since it uses as much as digits as its factorization.

20826923137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 43.

The spelling of 20826923137 in words is "twenty billion, eight hundred twenty-six million, nine hundred twenty-three thousand, one hundred thirty-seven".