20671894 has 16 divisors (see below), whose sum is σ = 32677632. Its totient is φ = 9788328.

The previous prime is 20671891. The next prime is 20671901. The reversal of 20671894 is 49817602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20671891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2557 + ... + 6919.

It is an arithmetic number, because the mean of its divisors is an integer number (2042352).

Almost surely, 2^20671894 is an apocalyptic number.

20671894 is a deficient number, since it is larger than the sum of its proper divisors (12005738).

20671894 is a wasteful number, since it uses less digits than its factorization.

20671894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4491.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 20671894 is about 4546.6354593259. The cubic root of 20671894 is about 274.4480123355.

The spelling of 20671894 in words is "twenty million, six hundred seventy-one thousand, eight hundred ninety-four".