20850490 has 8 divisors (see below), whose sum is σ = 37530900. Its totient is φ = 8340192.

The previous prime is 20850463. The next prime is 20850491. The reversal of 20850490 is 9405802.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19598329 + 1252161 = 4427^2 + 1119^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20850491) 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, 1042515 + ... + 1042534.

Almost surely, 2^20850490 is an apocalyptic number.

20850490 is a deficient number, since it is larger than the sum of its proper divisors (16680410).

20850490 is a wasteful number, since it uses less digits than its factorization.

20850490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2085056.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 20850490 is about 4566.2336777699. The cubic root of 20850490 is about 275.2361167698.

The spelling of 20850490 in words is "twenty million, eight hundred fifty thousand, four hundred ninety".