20634099 has 4 divisors (see below), whose sum is σ = 27512136. Its totient is φ = 13756064.

The previous prime is 20634077. The next prime is 20634101. The reversal of 20634099 is 99043602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20634099 - 2⁵ = 20634067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20634799) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3439014 + ... + 3439019.

It is an arithmetic number, because the mean of its divisors is an integer number (6878034).

Almost surely, 2^20634099 is an apocalyptic number.

20634099 is a deficient number, since it is larger than the sum of its proper divisors (6878037).

20634099 is an equidigital number, since it uses as much as digits as its factorization.

20634099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6878036.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 20634099 is about 4542.4771876147. The cubic root of 20634099 is about 274.2806499793.

The spelling of 20634099 in words is "twenty million, six hundred thirty-four thousand, ninety-nine".