20401606 has 8 divisors (see below), whose sum is σ = 30643200. Its totient is φ = 10187208.

The previous prime is 20401603. The next prime is 20401609. The reversal of 20401606 is 60610402.

It is an interprime number because it is at equal distance from previous prime (20401603) and next prime (20401609).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20401603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4806 + ... + 7993.

It is an arithmetic number, because the mean of its divisors is an integer number (3830400).

Almost surely, 2^20401606 is an apocalyptic number.

20401606 is a deficient number, since it is larger than the sum of its proper divisors (10241594).

20401606 is a wasteful number, since it uses less digits than its factorization.

20401606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13598.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 20401606 is about 4516.8136999438. The cubic root of 20401606 is about 273.2466117243.

The spelling of 20401606 in words is "twenty million, four hundred one thousand, six hundred six".