21054104435 has 64 divisors (see below), whose sum is σ = 32556625920. Its totient is φ = 12704186880.

The previous prime is 21054104399. The next prime is 21054104453. The reversal of 21054104435 is 53440145012.

It is not a de Polignac number, because 21054104435 - 2⁸ = 21054104179 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21054104398 and 21054104407.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3251381 + ... + 3257849.

It is an arithmetic number, because the mean of its divisors is an integer number (508697280).

Almost surely, 2^21054104435 is an apocalyptic number.

21054104435 is a deficient number, since it is larger than the sum of its proper divisors (11502521485).

21054104435 is a wasteful number, since it uses less digits than its factorization.

21054104435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6828.

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 21054104435 its reverse (53440145012), we get a palindrome (74494249447).

The spelling of 21054104435 in words is "twenty-one billion, fifty-four million, one hundred four thousand, four hundred thirty-five".