20189654 has 4 divisors (see below), whose sum is σ = 30284484. Its totient is φ = 10094826.

The previous prime is 20189651. The next prime is 20189681. The reversal of 20189654 is 45698102.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20189651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5047412 + ... + 5047415.

It is an arithmetic number, because the mean of its divisors is an integer number (7571121).

Almost surely, 2^20189654 is an apocalyptic number.

20189654 is a deficient number, since it is larger than the sum of its proper divisors (10094830).

20189654 is a wasteful number, since it uses less digits than its factorization.

20189654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10094829.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 20189654 is about 4493.2898860412. The cubic root of 20189654 is about 272.2970640687.

The spelling of 20189654 in words is "twenty million, one hundred eighty-nine thousand, six hundred fifty-four".