20575668 has 12 divisors (see below), whose sum is σ = 48009920. Its totient is φ = 6858552.

The previous prime is 20575657. The next prime is 20575669. The reversal of 20575668 is 86657502.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×20575668² = 846716227292448, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20575669) 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, 857308 + ... + 857331.

Almost surely, 2^20575668 is an apocalyptic number.

It is an amenable number.

20575668 is an abundant number, since it is smaller than the sum of its proper divisors (27434252).

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

20575668 is a wasteful number, since it uses less digits than its factorization.

20575668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1714646 (or 1714644 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 39.

The square root of 20575668 is about 4536.0410051057. The cubic root of 20575668 is about 274.0215054071.

The spelling of 20575668 in words is "twenty million, five hundred seventy-five thousand, six hundred sixty-eight".