20850995 has 32 divisors (see below), whose sum is σ = 29113344. Its totient is φ = 14185600.

The previous prime is 20850979. The next prime is 20851007. The reversal of 20850995 is 59905802.

It is a happy number.

It is not a de Polignac number, because 20850995 - 2⁴ = 20850979 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66890 + ... + 67200.

It is an arithmetic number, because the mean of its divisors is an integer number (909792).

Almost surely, 2^20850995 is an apocalyptic number.

20850995 is a deficient number, since it is larger than the sum of its proper divisors (8262349).

20850995 is a wasteful number, since it uses less digits than its factorization.

20850995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403.

The product of its (nonzero) digits is 32400, while the sum is 38.

The square root of 20850995 is about 4566.2889746489. The cubic root of 20850995 is about 275.2383388298.

The spelling of 20850995 in words is "twenty million, eight hundred fifty thousand, nine hundred ninety-five".