20995101 has 24 divisors (see below), whose sum is σ = 31594680. Its totient is φ = 13418496.

The previous prime is 20995087. The next prime is 20995109. The reversal of 20995101 is 10159902.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2924100 + 18071001 = 1710^2 + 4251^2 .

It is not a de Polignac number, because 20995101 - 2⁵ = 20995069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20995109) 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, 66921 + ... + 67233.

It is an arithmetic number, because the mean of its divisors is an integer number (1316445).

Almost surely, 2^20995101 is an apocalyptic number.

It is an amenable number.

20995101 is a deficient number, since it is larger than the sum of its proper divisors (10599579).

20995101 is a wasteful number, since it uses less digits than its factorization.

20995101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605 (or 602 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 27.

The square root of 20995101 is about 4582.0411390558. The cubic root of 20995101 is about 275.8709620497.

The spelling of 20995101 in words is "twenty million, nine hundred ninety-five thousand, one hundred one".