20289297539 has 8 divisors (see below), whose sum is σ = 23935761408. Its totient is φ = 16829831880.

The previous prime is 20289297443. The next prime is 20289297557. The reversal of 20289297539 is 93579298202.

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 20289297539 - 2⁸ = 20289297283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20289297739) 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, 46749317 + ... + 46749750.

It is an arithmetic number, because the mean of its divisors is an integer number (2991970176).

Almost surely, 2^20289297539 is an apocalyptic number.

20289297539 is a deficient number, since it is larger than the sum of its proper divisors (3646463869).

20289297539 is an equidigital number, since it uses as much as digits as its factorization.

20289297539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93499105.

The product of its (nonzero) digits is 4898880, while the sum is 56.

The spelling of 20289297539 in words is "twenty billion, two hundred eighty-nine million, two hundred ninety-seven thousand, five hundred thirty-nine".