20146186 has 4 divisors (see below), whose sum is σ = 30219282. Its totient is φ = 10073092.

The previous prime is 20146177. The next prime is 20146219. The reversal of 20146186 is 68164102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 13097161 + 7049025 = 3619^2 + 2655^2 .

It is a super-4 number, since 4×20146186⁴ (a number of 30 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5036545 + ... + 5036548.

Almost surely, 2^20146186 is an apocalyptic number.

20146186 is a deficient number, since it is larger than the sum of its proper divisors (10073096).

20146186 is a wasteful number, since it uses less digits than its factorization.

20146186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10073095.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 20146186 is about 4488.4502893538. The cubic root of 20146186 is about 272.1015065925.

The spelling of 20146186 in words is "twenty million, one hundred forty-six thousand, one hundred eighty-six".