20850213 has 16 divisors (see below), whose sum is σ = 29116800. Its totient is φ = 13246464.

The previous prime is 20850169. The next prime is 20850223. The reversal of 20850213 is 31205802.

It is not a de Polignac number, because 20850213 - 2⁸ = 20849957 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20850213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20850223) 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, 30645 + ... + 31317.

It is an arithmetic number, because the mean of its divisors is an integer number (1819800).

Almost surely, 2^20850213 is an apocalyptic number.

20850213 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20850213 is a deficient number, since it is larger than the sum of its proper divisors (8266587).

20850213 is a wasteful number, since it uses less digits than its factorization.

20850213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1148.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 20850213 is about 4566.2033463261. The cubic root of 20850213 is about 275.2348979217.

The spelling of 20850213 in words is "twenty million, eight hundred fifty thousand, two hundred thirteen".