21360862439 has 8 divisors (see below), whose sum is σ = 24468026880. Its totient is φ = 18267601176.

The previous prime is 21360862421. The next prime is 21360862441. The reversal of 21360862439 is 93426806312.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21360862439 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21360862439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21360861439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3472499 + ... + 3478644.

It is an arithmetic number, because the mean of its divisors is an integer number (3058503360).

Almost surely, 2^21360862439 is an apocalyptic number.

21360862439 is a deficient number, since it is larger than the sum of its proper divisors (3107164441).

21360862439 is an equidigital number, since it uses as much as digits as its factorization.

21360862439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6951589.

The product of its (nonzero) digits is 373248, while the sum is 44.

The spelling of 21360862439 in words is "twenty-one billion, three hundred sixty million, eight hundred sixty-two thousand, four hundred thirty-nine".