20013648 has 40 divisors (see below), whose sum is σ = 52684128. Its totient is φ = 6544512.

The previous prime is 20013613. The next prime is 20013659. The reversal of 20013648 is 84631002.

It is a happy number.

It is a super-2 number, since 2×20013648² = 801092212535808, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 1390 + ... + 6477.

Almost surely, 2^20013648 is an apocalyptic number.

It is an amenable number.

20013648 is an abundant number, since it is smaller than the sum of its proper divisors (32670480).

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

20013648 is a wasteful number, since it uses less digits than its factorization.

20013648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7931 (or 7925 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 20013648 is about 4473.6615875589. The cubic root of 20013648 is about 271.5034915728.

The spelling of 20013648 in words is "twenty million, thirteen thousand, six hundred forty-eight".