20230666 has 4 divisors (see below), whose sum is σ = 30346002. Its totient is φ = 10115332.

The previous prime is 20230657. The next prime is 20230667. The reversal of 20230666 is 66603202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66603202 = 2 ⋅33301601.

It can be written as a sum of positive squares in only one way, i.e., 13905441 + 6325225 = 3729^2 + 2515^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20230666.

It is not an unprimeable number, because it can be changed into a prime (20230667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5057665 + ... + 5057668.

Almost surely, 2^20230666 is an apocalyptic number.

20230666 is a deficient number, since it is larger than the sum of its proper divisors (10115336).

20230666 is a wasteful number, since it uses less digits than its factorization.

20230666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10115335.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 20230666 is about 4497.8512647708. The cubic root of 20230666 is about 272.4813151063.

Adding to 20230666 its reverse (66603202), we get a palindrome (86833868).

The spelling of 20230666 in words is "twenty million, two hundred thirty thousand, six hundred sixty-six".