20021894 has 8 divisors (see below), whose sum is σ = 30114480. Its totient is φ = 9983736.

The previous prime is 20021887. The next prime is 20021917. The reversal of 20021894 is 49812002.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12674 + ... + 14165.

It is an arithmetic number, because the mean of its divisors is an integer number (3764310).

Almost surely, 2^20021894 is an apocalyptic number.

20021894 is a deficient number, since it is larger than the sum of its proper divisors (10092586).

20021894 is a wasteful number, since it uses less digits than its factorization.

20021894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27214.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 20021894 is about 4474.5831090728. The cubic root of 20021894 is about 271.5407746373.

Adding to 20021894 its reverse (49812002), we get a palindrome (69833896).

The spelling of 20021894 in words is "twenty million, twenty-one thousand, eight hundred ninety-four".