20958867008 has 56 divisors (see below), whose sum is σ = 43250388480. Its totient is φ = 10064929280.

The previous prime is 20958866983. The next prime is 20958867019. The reversal of 20958867008 is 80076885902.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 324935 + ... + 384057.

Almost surely, 2^20958867008 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20958867008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21625194240).

20958867008 is an abundant number, since it is smaller than the sum of its proper divisors (22291521472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20958867008 is a wasteful number, since it uses less digits than its factorization.

20958867008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59355 (or 59345 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 53.

The spelling of 20958867008 in words is "twenty billion, nine hundred fifty-eight million, eight hundred sixty-seven thousand, eight".