21023402118 has 8 divisors (see below), whose sum is σ = 42046804248. Its totient is φ = 7007800704.

The previous prime is 21023402077. The next prime is 21023402119. The reversal of 21023402118 is 81120432012.

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

21023402118 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21023402119) 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, 1751950171 + ... + 1751950182.

It is an arithmetic number, because the mean of its divisors is an integer number (5255850531).

Almost surely, 2^21023402118 is an apocalyptic number.

21023402118 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21023402118 is a wasteful number, since it uses less digits than its factorization.

21023402118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3503900358.

The product of its (nonzero) digits is 768, while the sum is 24.

The spelling of 21023402118 in words is "twenty-one billion, twenty-three million, four hundred two thousand, one hundred eighteen".