20872194 has 32 divisors (see below), whose sum is σ = 48522240. Its totient is φ = 5861712.

The previous prime is 20872193. The next prime is 20872211. The reversal of 20872194 is 49127802.

It is a happy number.

It is a super-3 number, since 3×20872194³ (a number of 23 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20872193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1734 + ... + 6689.

It is an arithmetic number, because the mean of its divisors is an integer number (1516320).

Almost surely, 2^20872194 is an apocalyptic number.

20872194 is an abundant number, since it is smaller than the sum of its proper divisors (27650046).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20872194 is a wasteful number, since it uses less digits than its factorization.

20872194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8494.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 20872194 is about 4568.6096353267. The cubic root of 20872194 is about 275.3315846001.

Adding to 20872194 its reverse (49127802), we get a palindrome (69999996).

The spelling of 20872194 in words is "twenty million, eight hundred seventy-two thousand, one hundred ninety-four".