20933081818923 has 8 divisors (see below), whose sum is σ = 28665121049488. Its totient is φ = 13578215233824.

The previous prime is 20933081818843. The next prime is 20933081818939. The reversal of 20933081818923 is 32981818033902.

It is a happy number.

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

It is not a de Polignac number, because 20933081818923 - 2¹⁰ = 20933081817899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20933081810923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94293161236 + ... + 94293161457.

It is an arithmetic number, because the mean of its divisors is an integer number (3583140131186).

Almost surely, 2^{20933081818923} is an apocalyptic number.

20933081818923 is a deficient number, since it is larger than the sum of its proper divisors (7732039230565).

20933081818923 is a wasteful number, since it uses less digits than its factorization.

20933081818923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188586322733.

The product of its (nonzero) digits is 4478976, while the sum is 57.

The spelling of 20933081818923 in words is "twenty trillion, nine hundred thirty-three billion, eighty-one million, eight hundred eighteen thousand, nine hundred twenty-three".