20850479 has 16 divisors (see below), whose sum is σ = 23073792. Its totient is φ = 18724608.

The previous prime is 20850463. The next prime is 20850491. The reversal of 20850479 is 97405802.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20850479 - 2⁴ = 20850463 is a prime.

It is a super-3 number, since 3×20850479³ (a number of 23 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20850409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120437 + ... + 120609.

It is an arithmetic number, because the mean of its divisors is an integer number (1442112).

Almost surely, 2^20850479 is an apocalyptic number.

20850479 is a deficient number, since it is larger than the sum of its proper divisors (2223313).

20850479 is a wasteful number, since it uses less digits than its factorization.

20850479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 20850479 is about 4566.2324732760. The cubic root of 20850479 is about 275.2360683681.

The spelling of 20850479 in words is "twenty million, eight hundred fifty thousand, four hundred seventy-nine".