21210430650239 has 8 divisors (see below), whose sum is σ = 21251688243120. Its totient is φ = 21169205006976.

The previous prime is 21210430650203. The next prime is 21210430650259. The reversal of 21210430650239 is 93205603401212.

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 21210430650239 - 2⁸ = 21210430649983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210430650259) 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, 6658157 + ... + 9314070.

It is an arithmetic number, because the mean of its divisors is an integer number (2656461030390).

Almost surely, 2^{21210430650239} is an apocalyptic number.

21210430650239 is a deficient number, since it is larger than the sum of its proper divisors (41257592881).

21210430650239 is a wasteful number, since it uses less digits than its factorization.

21210430650239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15974809.

The product of its (nonzero) digits is 77760, while the sum is 38.

The spelling of 21210430650239 in words is "twenty-one trillion, two hundred ten billion, four hundred thirty million, six hundred fifty thousand, two hundred thirty-nine".