21430312545 has 8 divisors (see below), whose sum is σ = 34288500096. Its totient is φ = 11429500016.

The previous prime is 21430312531. The next prime is 21430312573. The reversal of 21430312545 is 54521303412.

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

It is a cyclic number.

It is not a de Polignac number, because 21430312545 - 2⁸ = 21430312289 is a prime.

It is a Curzon number.

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 7 ways as a sum of consecutive naturals, for example, 714343737 + ... + 714343766.

It is an arithmetic number, because the mean of its divisors is an integer number (4286062512).

Almost surely, 2^21430312545 is an apocalyptic number.

It is an amenable number.

21430312545 is a deficient number, since it is larger than the sum of its proper divisors (12858187551).

21430312545 is a wasteful number, since it uses less digits than its factorization.

21430312545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1428687511.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 21430312545 its reverse (54521303412), we get a palindrome (75951615957).

The spelling of 21430312545 in words is "twenty-one billion, four hundred thirty million, three hundred twelve thousand, five hundred forty-five".