21450316245 has 32 divisors (see below), whose sum is σ = 35282991744. Its totient is φ = 11121331200.

The previous prime is 21450316243. The next prime is 21450316309. The reversal of 21450316245 is 54261305412.

It is not a de Polignac number, because 21450316245 - 2¹ = 21450316243 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21450316241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 110754 + ... + 234876.

It is an arithmetic number, because the mean of its divisors is an integer number (1102593492).

Almost surely, 2^21450316245 is an apocalyptic number.

It is an amenable number.

21450316245 is a deficient number, since it is larger than the sum of its proper divisors (13832675499).

21450316245 is a wasteful number, since it uses less digits than its factorization.

21450316245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124453.

The product of its (nonzero) digits is 28800, while the sum is 33.

The spelling of 21450316245 in words is "twenty-one billion, four hundred fifty million, three hundred sixteen thousand, two hundred forty-five".