20066251 has 8 divisors (see below), whose sum is σ = 20599040. Its totient is φ = 19536552.

The previous prime is 20066243. The next prime is 20066257. The reversal of 20066251 is 15266002.

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

It is a cyclic number.

It is not a de Polignac number, because 20066251 - 2³ = 20066243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20066257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18346 + ... + 19408.

It is an arithmetic number, because the mean of its divisors is an integer number (2574880).

Almost surely, 2^20066251 is an apocalyptic number.

20066251 is a deficient number, since it is larger than the sum of its proper divisors (532789).

20066251 is a wasteful number, since it uses less digits than its factorization.

20066251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1545.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 20066251 is about 4479.5369180307. The cubic root of 20066251 is about 271.7411527889.

The spelling of 20066251 in words is "twenty million, sixty-six thousand, two hundred fifty-one".