20475849 has 8 divisors (see below), whose sum is σ = 27328672. Its totient is φ = 13636800.

The previous prime is 20475839. The next prime is 20475853. The reversal of 20475849 is 94857402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20475849 - 2⁵ = 20475817 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20475839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 762 + ... + 6444.

It is an arithmetic number, because the mean of its divisors is an integer number (3416084).

Almost surely, 2^20475849 is an apocalyptic number.

It is an amenable number.

20475849 is a deficient number, since it is larger than the sum of its proper divisors (6852823).

20475849 is a wasteful number, since it uses less digits than its factorization.

20475849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6887.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 20475849 is about 4525.0247513135. The cubic root of 20475849 is about 273.5776655574.

The spelling of 20475849 in words is "twenty million, four hundred seventy-five thousand, eight hundred forty-nine".