21120004354 has 8 divisors (see below), whose sum is σ = 31993670268. Its totient is φ = 10455447600.

The previous prime is 21120004351. The next prime is 21120004361. The reversal of 21120004354 is 45340002112.

It can be written as a sum of positive squares in 2 ways, for example, as 20528298729 + 591705625 = 143277^2 + 24325^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21120004351) 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, 52277037 + ... + 52277440.

Almost surely, 2^21120004354 is an apocalyptic number.

21120004354 is a deficient number, since it is larger than the sum of its proper divisors (10873665914).

21120004354 is a wasteful number, since it uses less digits than its factorization.

21120004354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104554580.

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 21120004354 its reverse (45340002112), we get a palindrome (66460006466).

The spelling of 21120004354 in words is "twenty-one billion, one hundred twenty million, four thousand, three hundred fifty-four".