20950870 has 16 divisors (see below), whose sum is σ = 37787328. Its totient is φ = 8363520.

The previous prime is 20950849. The next prime is 20950871. The reversal of 20950870 is 7805902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20950871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3955 + ... + 7585.

It is an arithmetic number, because the mean of its divisors is an integer number (2361708).

Almost surely, 2^20950870 is an apocalyptic number.

20950870 is a deficient number, since it is larger than the sum of its proper divisors (16836458).

20950870 is a wasteful number, since it uses less digits than its factorization.

20950870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4215.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 20950870 is about 4577.2120335418. The cubic root of 20950870 is about 275.6770973417.

The spelling of 20950870 in words is "twenty million, nine hundred fifty thousand, eight hundred seventy".