20003648 has 28 divisors (see below), whose sum is σ = 45366432. Its totient is φ = 8572800.

The previous prime is 20003609. The next prime is 20003663. The reversal of 20003648 is 84630002.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (28).

It is a congruent number.

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, 21878 + ... + 22773.

Almost surely, 2^20003648 is an apocalyptic number.

20003648 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20003648 is an abundant number, since it is smaller than the sum of its proper divisors (25362784).

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

20003648 is an equidigital number, since it uses as much as digits as its factorization.

20003648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44670 (or 44660 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 20003648 is about 4472.5437952020. The cubic root of 20003648 is about 271.4582643153.

The spelling of 20003648 in words is "twenty million, three thousand, six hundred forty-eight".