20893820 has 24 divisors (see below), whose sum is σ = 44108064. Its totient is φ = 8313536.

The previous prime is 20893811. The next prime is 20893849. The reversal of 20893820 is 2839802.

It is a happy number.

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, 1289 + ... + 6591.

It is an arithmetic number, because the mean of its divisors is an integer number (1837836).

Almost surely, 2^20893820 is an apocalyptic number.

20893820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20893820 is an abundant number, since it is smaller than the sum of its proper divisors (23214244).

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

20893820 is a wasteful number, since it uses less digits than its factorization.

20893820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5509 (or 5507 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 20893820 is about 4570.9758257948. The cubic root of 20893820 is about 275.4266435348.

The spelling of 20893820 in words is "twenty million, eight hundred ninety-three thousand, eight hundred twenty".