21071059239 has 8 divisors (see below), whose sum is σ = 28096709760. Its totient is φ = 14046390776.

The previous prime is 21071059213. The next prime is 21071059277. The reversal of 21071059239 is 93295017012.

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 21071059239 - 2⁹ = 21071058727 is a prime.

It is a super-3 number, since 3×21071059239³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21071059197 and 21071059206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21071059039) 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, 193899 + ... + 282380.

It is an arithmetic number, because the mean of its divisors is an integer number (3512088720).

Almost surely, 2^21071059239 is an apocalyptic number.

21071059239 is a deficient number, since it is larger than the sum of its proper divisors (7025650521).

21071059239 is a wasteful number, since it uses less digits than its factorization.

21071059239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491029.

The product of its (nonzero) digits is 34020, while the sum is 39.

The spelling of 21071059239 in words is "twenty-one billion, seventy-one million, fifty-nine thousand, two hundred thirty-nine".