20677650 has 96 divisors (see below), whose sum is σ = 59996160. Its totient is φ = 4614720.

The previous prime is 20677649. The next prime is 20677663. The reversal of 20677650 is 5677602.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 49141 + ... + 49559.

It is an arithmetic number, because the mean of its divisors is an integer number (624960).

Almost surely, 2^20677650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20677650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29998080).

20677650 is an abundant number, since it is smaller than the sum of its proper divisors (39318510).

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

20677650 is a wasteful number, since it uses less digits than its factorization.

20677650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488 (or 483 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 33.

The square root of 20677650 is about 4547.2684108154. The cubic root of 20677650 is about 274.4734829279.

The spelling of 20677650 in words is "twenty million, six hundred seventy-seven thousand, six hundred fifty".