21302142245 has 16 divisors (see below), whose sum is σ = 26440307712. Its totient is φ = 16464627840.

The previous prime is 21302142227. The next prime is 21302142271. The reversal of 21302142245 is 54224120312.

It is not a de Polignac number, because 21302142245 - 2⁸ = 21302141989 is a prime.

It is a Duffinian number.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 483317 + ... + 525546.

It is an arithmetic number, because the mean of its divisors is an integer number (1652519232).

Almost surely, 2^21302142245 is an apocalyptic number.

It is an amenable number.

21302142245 is a deficient number, since it is larger than the sum of its proper divisors (5138165467).

21302142245 is a wasteful number, since it uses less digits than its factorization.

21302142245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009012.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 21302142245 its reverse (54224120312), we get a palindrome (75526262557).

The spelling of 21302142245 in words is "twenty-one billion, three hundred two million, one hundred forty-two thousand, two hundred forty-five".