20958882257 has 8 divisors (see below), whose sum is σ = 21021687936. Its totient is φ = 20896108272.

The previous prime is 20958882223. The next prime is 20958882271. The reversal of 20958882257 is 75228885902.

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 20958882257 - 2⁶ = 20958882193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20958882757) 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, 2221883 + ... + 2231295.

It is an arithmetic number, because the mean of its divisors is an integer number (2627710992).

Almost surely, 2^20958882257 is an apocalyptic number.

It is an amenable number.

20958882257 is a deficient number, since it is larger than the sum of its proper divisors (62805679).

20958882257 is an equidigital number, since it uses as much as digits as its factorization.

20958882257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15847.

The product of its (nonzero) digits is 6451200, while the sum is 56.

The spelling of 20958882257 in words is "twenty billion, nine hundred fifty-eight million, eight hundred eighty-two thousand, two hundred fifty-seven".