20986101 has 16 divisors (see below), whose sum is σ = 32094720. Its totient is φ = 13538880.

The previous prime is 20986093. The next prime is 20986117. The reversal of 20986101 is 10168902.

It is not a de Polignac number, because 20986101 - 2³ = 20986093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20986151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11700 + ... + 13373.

It is an arithmetic number, because the mean of its divisors is an integer number (2005920).

Almost surely, 2^20986101 is an apocalyptic number.

It is an amenable number.

20986101 is a deficient number, since it is larger than the sum of its proper divisors (11108619).

20986101 is a wasteful number, since it uses less digits than its factorization.

20986101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25113 (or 25107 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 20986101 is about 4581.0589387171. The cubic root of 20986101 is about 275.8315370823.

The spelling of 20986101 in words is "twenty million, nine hundred eighty-six thousand, one hundred one".