20463666 has 8 divisors (see below), whose sum is σ = 40927344. Its totient is φ = 6821220.

The previous prime is 20463661. The next prime is 20463673. The reversal of 20463666 is 66636402.

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

20463666 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20463661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1705300 + ... + 1705311.

It is an arithmetic number, because the mean of its divisors is an integer number (5115918).

Almost surely, 2^20463666 is an apocalyptic number.

20463666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20463666 is a wasteful number, since it uses less digits than its factorization.

20463666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3410616.

The product of its (nonzero) digits is 31104, while the sum is 33.

The square root of 20463666 is about 4523.6783705299. The cubic root of 20463666 is about 273.5233958019.

The spelling of 20463666 in words is "twenty million, four hundred sixty-three thousand, six hundred sixty-six".