20662099 has 4 divisors (see below), whose sum is σ = 20671200. Its totient is φ = 20653000.

The previous prime is 20662091. The next prime is 20662121. The reversal of 20662099 is 99026602.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20662099 - 2³ = 20662091 is a prime.

It is a super-3 number, since 3×20662099³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20662091) 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, 1974 + ... + 6724.

It is an arithmetic number, because the mean of its divisors is an integer number (5167800).

Almost surely, 2^20662099 is an apocalyptic number.

20662099 is a deficient number, since it is larger than the sum of its proper divisors (9101).

20662099 is an equidigital number, since it uses as much as digits as its factorization.

20662099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9100.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 20662099 is about 4545.5581615463. The cubic root of 20662099 is about 274.4046580920.

The spelling of 20662099 in words is "twenty million, six hundred sixty-two thousand, ninety-nine".