20488666 has 8 divisors (see below), whose sum is σ = 33526944. Its totient is φ = 9313020.

The previous prime is 20488651. The next prime is 20488673. The reversal of 20488666 is 66688402.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 465630 + ... + 465673.

It is an arithmetic number, because the mean of its divisors is an integer number (4190868).

Almost surely, 2^20488666 is an apocalyptic number.

20488666 is a deficient number, since it is larger than the sum of its proper divisors (13038278).

20488666 is a wasteful number, since it uses less digits than its factorization.

20488666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931316.

The product of its (nonzero) digits is 110592, while the sum is 40.

The square root of 20488666 is about 4526.4407651045. The cubic root of 20488666 is about 273.6347362649.

The spelling of 20488666 in words is "twenty million, four hundred eighty-eight thousand, six hundred sixty-six".