21623223811 has 8 divisors (see below), whose sum is σ = 24721113440. Its totient is φ = 18527548608.

The previous prime is 21623223799. The next prime is 21623223833. The reversal of 21623223811 is 11832232612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21623223811 - 2¹³ = 21623215619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21623223851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 532626 + ... + 571783.

It is an arithmetic number, because the mean of its divisors is an integer number (3090139180).

Almost surely, 2^21623223811 is an apocalyptic number.

21623223811 is a deficient number, since it is larger than the sum of its proper divisors (3097889629).

21623223811 is a wasteful number, since it uses less digits than its factorization.

21623223811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1107213.

The product of its digits is 6912, while the sum is 31.

The spelling of 21623223811 in words is "twenty-one billion, six hundred twenty-three million, two hundred twenty-three thousand, eight hundred eleven".