21282024739 has 8 divisors (see below), whose sum is σ = 21737018880. Its totient is φ = 20827121736.

The previous prime is 21282024727. The next prime is 21282024809. The reversal of 21282024739 is 93742028212.

It is a happy number.

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 21282024739 - 2¹⁵ = 21281991971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21282024139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 674682 + ... + 705520.

It is an arithmetic number, because the mean of its divisors is an integer number (2717127360).

Almost surely, 2^21282024739 is an apocalyptic number.

21282024739 is a deficient number, since it is larger than the sum of its proper divisors (454994141).

21282024739 is a wasteful number, since it uses less digits than its factorization.

21282024739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45569.

The product of its (nonzero) digits is 96768, while the sum is 40.

The spelling of 21282024739 in words is "twenty-one billion, two hundred eighty-two million, twenty-four thousand, seven hundred thirty-nine".