21868115073 has 8 divisors (see below), whose sum is σ = 33322842048. Its totient is φ = 12496065744.

The previous prime is 21868115041. The next prime is 21868115167. The reversal of 21868115073 is 37051186812.

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

It is not a de Polignac number, because 21868115073 - 2⁵ = 21868115041 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (21868113073) 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, 520669386 + ... + 520669427.

It is an arithmetic number, because the mean of its divisors is an integer number (4165355256).

Almost surely, 2^21868115073 is an apocalyptic number.

It is an amenable number.

21868115073 is a deficient number, since it is larger than the sum of its proper divisors (11454726975).

21868115073 is a wasteful number, since it uses less digits than its factorization.

21868115073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041338823.

The product of its (nonzero) digits is 80640, while the sum is 42.

The spelling of 21868115073 in words is "twenty-one billion, eight hundred sixty-eight million, one hundred fifteen thousand, seventy-three".