20748812 has 24 divisors (see below), whose sum is σ = 41696256. Its totient is φ = 8849808.

The previous prime is 20748809. The next prime is 20748821. The reversal of 20748812 is 21884702.

It is a super-2 number, since 2×20748812² = 861026398822688, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4583 + ... + 7905.

It is an arithmetic number, because the mean of its divisors is an integer number (1737344).

Almost surely, 2^20748812 is an apocalyptic number.

It is an amenable number.

20748812 is an abundant number, since it is smaller than the sum of its proper divisors (20947444).

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

20748812 is a wasteful number, since it uses less digits than its factorization.

20748812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3557 (or 3555 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 20748812 is about 4555.0863877648. The cubic root of 20748812 is about 274.7879886579.

The spelling of 20748812 in words is "twenty million, seven hundred forty-eight thousand, eight hundred twelve".