20998095 has 16 divisors (see below), whose sum is σ = 33925632. Its totient is φ = 11089440.

The previous prime is 20998093. The next prime is 20998139. The reversal of 20998095 is 59089902.

It is not a de Polignac number, because 20998095 - 2¹ = 20998093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20998093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5251 + ... + 8340.

It is an arithmetic number, because the mean of its divisors is an integer number (2120352).

Almost surely, 2^20998095 is an apocalyptic number.

20998095 is a deficient number, since it is larger than the sum of its proper divisors (12927537).

20998095 is a wasteful number, since it uses less digits than its factorization.

20998095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13702.

The product of its (nonzero) digits is 58320, while the sum is 42.

The square root of 20998095 is about 4582.3678377014. The cubic root of 20998095 is about 275.8840749246.

The spelling of 20998095 in words is "twenty million, nine hundred ninety-eight thousand, ninety-five".