21432254045 has 16 divisors (see below), whose sum is σ = 26274792960. Its totient is φ = 16778920704.

The previous prime is 21432254021. The next prime is 21432254071. The reversal of 21432254045 is 54045223412.

It is a cyclic number.

It is not a de Polignac number, because 21432254045 - 2¹⁴ = 21432237661 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 195449 + ... + 284718.

It is an arithmetic number, because the mean of its divisors is an integer number (1642174560).

Almost surely, 2^21432254045 is an apocalyptic number.

It is an amenable number.

21432254045 is a deficient number, since it is larger than the sum of its proper divisors (4842538915).

21432254045 is a wasteful number, since it uses less digits than its factorization.

21432254045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480364.

The product of its (nonzero) digits is 38400, while the sum is 32.

Adding to 21432254045 its reverse (54045223412), we get a palindrome (75477477457).

The spelling of 21432254045 in words is "twenty-one billion, four hundred thirty-two million, two hundred fifty-four thousand, forty-five".