20673600 has 168 divisors, whose sum is σ = 69921120. Its totient is φ = 5345280.

The previous prime is 20673599. The next prime is 20673613. The reversal of 20673600 is 637602.

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

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 23 ways as a sum of consecutive naturals, for example, 283164 + ... + 283236.

Almost surely, 2^20673600 is an apocalyptic number.

20673600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20673600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34960560).

20673600 is an abundant number, since it is smaller than the sum of its proper divisors (49247520).

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

20673600 is a wasteful number, since it uses less digits than its factorization.

20673600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 24.

The square root of 20673600 is about 4546.8230667137. The cubic root of 20673600 is about 274.4555619651.

The spelling of 20673600 in words is "twenty million, six hundred seventy-three thousand, six hundred".