20858222145 has 16 divisors (see below), whose sum is σ = 33394737600. Its totient is φ = 11117191104.

The previous prime is 20858222117. The next prime is 20858222149. The reversal of 20858222145 is 54122285802.

It is not a de Polignac number, because 20858222145 - 2³² = 16563254849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20858222149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 425619 + ... + 472088.

It is an arithmetic number, because the mean of its divisors is an integer number (2087171100).

Almost surely, 2^20858222145 is an apocalyptic number.

It is an amenable number.

20858222145 is a deficient number, since it is larger than the sum of its proper divisors (12536515455).

20858222145 is a wasteful number, since it uses less digits than its factorization.

20858222145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899264.

The product of its (nonzero) digits is 102400, while the sum is 39.

The spelling of 20858222145 in words is "twenty billion, eight hundred fifty-eight million, two hundred twenty-two thousand, one hundred forty-five".