20012021093 has 2 divisors, whose sum is σ = 20012021094. Its totient is φ = 20012021092.

The previous prime is 20012021083. The next prime is 20012021129. The reversal of 20012021093 is 39012021002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14836945249 + 5175075844 = 121807^2 + 71938^2 .

It is a cyclic number.

It is not a de Polignac number, because 20012021093 - 2⁸ = 20012020837 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20012021083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006010546 + 10006010547.

It is an arithmetic number, because the mean of its divisors is an integer number (10006010547).

Almost surely, 2^20012021093 is an apocalyptic number.

It is an amenable number.

20012021093 is a deficient number, since it is larger than the sum of its proper divisors (1).

20012021093 is an equidigital number, since it uses as much as digits as its factorization.

20012021093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 20012021093 its reverse (39012021002), we get a palindrome (59024042095).

The spelling of 20012021093 in words is "twenty billion, twelve million, twenty-one thousand, ninety-three".