20218346923 has 2 divisors, whose sum is σ = 20218346924. Its totient is φ = 20218346922.

The previous prime is 20218346873. The next prime is 20218346957. The reversal of 20218346923 is 32964381202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20218346923 - 2²⁵ = 20184792491 is a prime.

It is not a weakly prime, because it can be changed into another prime (20218346963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10109173461 + 10109173462.

It is an arithmetic number, because the mean of its divisors is an integer number (10109173462).

Almost surely, 2^20218346923 is an apocalyptic number.

20218346923 is a deficient number, since it is larger than the sum of its proper divisors (1).

20218346923 is an equidigital number, since it uses as much as digits as its factorization.

20218346923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 40.

The spelling of 20218346923 in words is "twenty billion, two hundred eighteen million, three hundred forty-six thousand, nine hundred twenty-three".