23213020109 has 2 divisors, whose sum is σ = 23213020110. Its totient is φ = 23213020108.

The previous prime is 23213020097. The next prime is 23213020123. The reversal of 23213020109 is 90102031232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13421917609 + 9791102500 = 115853^2 + 98950^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23213020109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23213020199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11606510054 + 11606510055.

It is an arithmetic number, because the mean of its divisors is an integer number (11606510055).

Almost surely, 2^23213020109 is an apocalyptic number.

It is an amenable number.

23213020109 is a deficient number, since it is larger than the sum of its proper divisors (1).

23213020109 is an equidigital number, since it uses as much as digits as its factorization.

23213020109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 23.

The spelling of 23213020109 in words is "twenty-three billion, two hundred thirteen million, twenty thousand, one hundred nine".