20061650 has 72 divisors (see below), whose sum is σ = 45068544. Its totient is φ = 6501600.

The previous prime is 20061623. The next prime is 20061653. The reversal of 20061650 is 5616002.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20061653) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 466529 + ... + 466571.

It is an arithmetic number, because the mean of its divisors is an integer number (625952).

Almost surely, 2^20061650 is an apocalyptic number.

20061650 is an abundant number, since it is smaller than the sum of its proper divisors (25006894).

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

20061650 is a wasteful number, since it uses less digits than its factorization.

20061650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136 (or 88 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 20061650 is about 4479.0233310399. The cubic root of 20061650 is about 271.7203819830.

Adding to 20061650 its reverse (5616002), we get a palindrome (25677652).

The spelling of 20061650 in words is "twenty million, sixty-one thousand, six hundred fifty".