23213099999 has 4 divisors (see below), whose sum is σ = 23220047136. Its totient is φ = 23206152864.

The previous prime is 23213099977. The next prime is 23213100073. The reversal of 23213099999 is 99999031232.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23213099999 - 2¹⁶ = 23213034463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23213099969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3468554 + ... + 3475239.

It is an arithmetic number, because the mean of its divisors is an integer number (5805011784).

Almost surely, 2^23213099999 is an apocalyptic number.

23213099999 is a deficient number, since it is larger than the sum of its proper divisors (6947137).

23213099999 is an equidigital number, since it uses as much as digits as its factorization.

23213099999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6947136.

The product of its (nonzero) digits is 2125764, while the sum is 56.

The spelling of 23213099999 in words is "twenty-three billion, two hundred thirteen million, ninety-nine thousand, nine hundred ninety-nine".