20741099 has 4 divisors (see below), whose sum is σ = 20899560. Its totient is φ = 20582640.

The previous prime is 20741069. The next prime is 20741107. The reversal of 20741099 is 99014702.

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 20741099 - 2²⁰ = 19692523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20741029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79034 + ... + 79295.

It is an arithmetic number, because the mean of its divisors is an integer number (5224890).

Almost surely, 2^20741099 is an apocalyptic number.

20741099 is a deficient number, since it is larger than the sum of its proper divisors (158461).

20741099 is a wasteful number, since it uses less digits than its factorization.

20741099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158460.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 20741099 is about 4554.2396730958. The cubic root of 20741099 is about 274.7539352636.

The spelling of 20741099 in words is "twenty million, seven hundred forty-one thousand, ninety-nine".