20660610 has 48 divisors (see below), whose sum is σ = 52695936. Its totient is φ = 5183232.

The previous prime is 20660603. The next prime is 20660611. The reversal of 20660610 is 1606602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20660611) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7479 + ... + 9861.

It is an arithmetic number, because the mean of its divisors is an integer number (1097832).

Almost surely, 2^20660610 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20660610, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26347968).

20660610 is an abundant number, since it is smaller than the sum of its proper divisors (32035326).

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

20660610 is a wasteful number, since it uses less digits than its factorization.

20660610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2427 (or 2410 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 20660610 is about 4545.3943723290. The cubic root of 20660610 is about 274.3980663391.

The spelling of 20660610 in words is "twenty million, six hundred sixty thousand, six hundred ten".