563644020 has 24 divisors (see below), whose sum is σ = 1578203424. Its totient is φ = 150305056.

The previous prime is 563643991. The next prime is 563644021. The reversal of 563644020 is 20446365.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (563644021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4696974 + ... + 4697093.

It is an arithmetic number, because the mean of its divisors is an integer number (65758476).

Almost surely, 2^563644020 is an apocalyptic number.

It is an amenable number.

563644020 is an abundant number, since it is smaller than the sum of its proper divisors (1014559404).

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

563644020 is a wasteful number, since it uses less digits than its factorization.

563644020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9394079 (or 9394077 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 563644020 is about 23741.1882600682. The cubic root of 563644020 is about 826.0410585660.

The spelling of 563644020 in words is "five hundred sixty-three million, six hundred forty-four thousand, twenty".