20663486 has 16 divisors (see below), whose sum is σ = 32432400. Its totient is φ = 9860928.

The previous prime is 20663473. The next prime is 20663491. The reversal of 20663486 is 68436602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3161 + ... + 7163.

It is an arithmetic number, because the mean of its divisors is an integer number (2027025).

Almost surely, 2^20663486 is an apocalyptic number.

20663486 is a deficient number, since it is larger than the sum of its proper divisors (11768914).

20663486 is a wasteful number, since it uses less digits than its factorization.

20663486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4123.

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 20663486 is about 4545.7107255082. The cubic root of 20663486 is about 274.4107980094.

The spelling of 20663486 in words is "twenty million, six hundred sixty-three thousand, four hundred eighty-six".