20203213091 has 2 divisors, whose sum is σ = 20203213092. Its totient is φ = 20203213090.

The previous prime is 20203213067. The next prime is 20203213141. The reversal of 20203213091 is 19031230202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20203213091 - 2⁶ = 20203213027 is a prime.

It is not a weakly prime, because it can be changed into another prime (20203213691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10101606545 + 10101606546.

It is an arithmetic number, because the mean of its divisors is an integer number (10101606546).

Almost surely, 2^20203213091 is an apocalyptic number.

20203213091 is a deficient number, since it is larger than the sum of its proper divisors (1).

20203213091 is an equidigital number, since it uses as much as digits as its factorization.

20203213091 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.

Adding to 20203213091 its reverse (19031230202), we get a palindrome (39234443293).

The spelling of 20203213091 in words is "twenty billion, two hundred three million, two hundred thirteen thousand, ninety-one".