20858850111 has 24 divisors (see below), whose sum is σ = 32368239792. Its totient is φ = 11898092800.

The previous prime is 20858850041. The next prime is 20858850127. The reversal of 20858850111 is 11105885802.

It is not a de Polignac number, because 20858850111 - 2¹⁰ = 20858849087 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20858850111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20858850151) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1683900 + ... + 1696241.

It is an arithmetic number, because the mean of its divisors is an integer number (1348676658).

Almost surely, 2^20858850111 is an apocalyptic number.

20858850111 is a deficient number, since it is larger than the sum of its proper divisors (11509389681).

20858850111 is a wasteful number, since it uses less digits than its factorization.

20858850111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3380183 (or 3380172 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 39.

The spelling of 20858850111 in words is "twenty billion, eight hundred fifty-eight million, eight hundred fifty thousand, one hundred eleven".