20677320 has 96 divisors (see below), whose sum is σ = 70761600. Its totient is φ = 5222016.

The previous prime is 20677313. The next prime is 20677331. The reversal of 20677320 is 2377602.

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, 5329 + ... + 8351.

It is an arithmetic number, because the mean of its divisors is an integer number (737100).

Almost surely, 2^20677320 is an apocalyptic number.

20677320 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 20677320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35380800).

20677320 is an abundant number, since it is smaller than the sum of its proper divisors (50084280).

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

20677320 is a wasteful number, since it uses less digits than its factorization.

20677320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3059 (or 3052 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 27.

The square root of 20677320 is about 4547.2321251504. The cubic root of 20677320 is about 274.4720227889.

The spelling of 20677320 in words is "twenty million, six hundred seventy-seven thousand, three hundred twenty".