21054104434 has 8 divisors (see below), whose sum is σ = 34452170928. Its totient is φ = 9570047460.

The previous prime is 21054104399. The next prime is 21054104453. The reversal of 21054104434 is 43440145012.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 478502352 + ... + 478502395.

It is an arithmetic number, because the mean of its divisors is an integer number (4306521366).

Almost surely, 2^21054104434 is an apocalyptic number.

21054104434 is a deficient number, since it is larger than the sum of its proper divisors (13398066494).

21054104434 is a wasteful number, since it uses less digits than its factorization.

21054104434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957004760.

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 21054104434 its reverse (43440145012), we get a palindrome (64494249446).

The spelling of 21054104434 in words is "twenty-one billion, fifty-four million, one hundred four thousand, four hundred thirty-four".