20902101 has 16 divisors (see below), whose sum is σ = 31726080. Its totient is φ = 12116720.

The previous prime is 20902081. The next prime is 20902103. The reversal of 20902101 is 10120902.

It is a happy number.

It is not a de Polignac number, because 20902101 - 2¹¹ = 20900053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20902103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13011 + ... + 14528.

It is an arithmetic number, because the mean of its divisors is an integer number (1982880).

Almost surely, 2^20902101 is an apocalyptic number.

It is an amenable number.

20902101 is a deficient number, since it is larger than the sum of its proper divisors (10823979).

20902101 is a wasteful number, since it uses less digits than its factorization.

20902101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27576.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 20902101 is about 4571.8815601457. The cubic root of 20902101 is about 275.4630260118.

The spelling of 20902101 in words is "twenty million, nine hundred two thousand, one hundred one".