20191606 has 8 divisors (see below), whose sum is σ = 30371040. Its totient is φ = 10067928.

The previous prime is 20191579. The next prime is 20191621. The reversal of 20191606 is 60619102.

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, 13021 + ... + 14488.

It is an arithmetic number, because the mean of its divisors is an integer number (3796380).

Almost surely, 2^20191606 is an apocalyptic number.

20191606 is a deficient number, since it is larger than the sum of its proper divisors (10179434).

20191606 is a wasteful number, since it uses less digits than its factorization.

20191606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27878.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 20191606 is about 4493.5070935740. The cubic root of 20191606 is about 272.3058393015.

The spelling of 20191606 in words is "twenty million, one hundred ninety-one thousand, six hundred six".