20196406 has 4 divisors (see below), whose sum is σ = 30294612. Its totient is φ = 10098202.

The previous prime is 20196389. The next prime is 20196409. The reversal of 20196406 is 60469102.

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 (20196409) 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, 5049100 + ... + 5049103.

It is an arithmetic number, because the mean of its divisors is an integer number (7573653).

Almost surely, 2^20196406 is an apocalyptic number.

20196406 is a deficient number, since it is larger than the sum of its proper divisors (10098206).

20196406 is a wasteful number, since it uses less digits than its factorization.

20196406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10098205.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 20196406 is about 4494.0411658106. The cubic root of 20196406 is about 272.3274153378.

It can be divided in two parts, 20196 and 406, that added together give a palindrome (20602).

The spelling of 20196406 in words is "twenty million, one hundred ninety-six thousand, four hundred six".