20694189 has 8 divisors (see below), whose sum is σ = 28044832. Its totient is φ = 13569840.

The previous prime is 20694187. The next prime is 20694199. The reversal of 20694189 is 98149602.

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

It is not a de Polignac number, because 20694189 - 2¹ = 20694187 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20694187) 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, 56359 + ... + 56724.

It is an arithmetic number, because the mean of its divisors is an integer number (3505604).

Almost surely, 2^20694189 is an apocalyptic number.

It is an amenable number.

20694189 is a deficient number, since it is larger than the sum of its proper divisors (7350643).

20694189 is a wasteful number, since it uses less digits than its factorization.

20694189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113147.

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 20694189 is about 4549.0866116178. The cubic root of 20694189 is about 274.5466425497.

It can be divided in two parts, 206 and 94189, that added together give a triangular number (94395 = T₄₃₄).

The spelling of 20694189 in words is "twenty million, six hundred ninety-four thousand, one hundred eighty-nine".