20411849 has 4 divisors (see below), whose sum is σ = 21612564. Its totient is φ = 19211136.

The previous prime is 20411843. The next prime is 20411869. The reversal of 20411849 is 94811402.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9653449 + 10758400 = 3107^2 + 3280^2 .

It is a cyclic number.

It is not a de Polignac number, because 20411849 - 2⁸ = 20411593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20411843) 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, 600332 + ... + 600365.

It is an arithmetic number, because the mean of its divisors is an integer number (5403141).

Almost surely, 2^20411849 is an apocalyptic number.

It is an amenable number.

20411849 is a deficient number, since it is larger than the sum of its proper divisors (1200715).

20411849 is a wasteful number, since it uses less digits than its factorization.

20411849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1200714.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 20411849 is about 4517.9474321864. The cubic root of 20411849 is about 273.2923335622.

The spelling of 20411849 in words is "twenty million, four hundred eleven thousand, eight hundred forty-nine".