20870194 has 8 divisors (see below), whose sum is σ = 31497840. Its totient is φ = 10370916.

The previous prime is 20870191. The next prime is 20870219. The reversal of 20870194 is 49107802.

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

It is not an unprimeable number, because it can be changed into a prime (20870191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31684 + ... + 32335.

It is an arithmetic number, because the mean of its divisors is an integer number (3937230).

Almost surely, 2^20870194 is an apocalyptic number.

20870194 is a deficient number, since it is larger than the sum of its proper divisors (10627646).

20870194 is a wasteful number, since it uses less digits than its factorization.

20870194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64184.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 20870194 is about 4568.3907451093. The cubic root of 20870194 is about 275.3227901125.

Adding to 20870194 its reverse (49107802), we get a palindrome (69977996).

The spelling of 20870194 in words is "twenty million, eight hundred seventy thousand, one hundred ninety-four".