21052107259 has 8 divisors (see below), whose sum is σ = 21350029680. Its totient is φ = 20755549056.

The previous prime is 21052107229. The next prime is 21052107269. The reversal of 21052107259 is 95270125012.

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 21052107259 - 2¹¹ = 21052105211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21052107229) 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, 309954 + ... + 371719.

It is an arithmetic number, because the mean of its divisors is an integer number (2668753710).

Almost surely, 2^21052107259 is an apocalyptic number.

21052107259 is a deficient number, since it is larger than the sum of its proper divisors (297922421).

21052107259 is an equidigital number, since it uses as much as digits as its factorization.

21052107259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682109.

The product of its (nonzero) digits is 12600, while the sum is 34.

The spelling of 21052107259 in words is "twenty-one billion, fifty-two million, one hundred seven thousand, two hundred fifty-nine".