20650061 has 8 divisors (see below), whose sum is σ = 21771264. Its totient is φ = 19557360.

The previous prime is 20650057. The next prime is 20650081. The reversal of 20650061 is 16005602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20650061 - 2² = 20650057 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20650081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5630 + ... + 8543.

It is an arithmetic number, because the mean of its divisors is an integer number (2721408).

Almost surely, 2^20650061 is an apocalyptic number.

It is an amenable number.

20650061 is a deficient number, since it is larger than the sum of its proper divisors (1121203).

20650061 is a wasteful number, since it uses less digits than its factorization.

20650061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14251.

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

The square root of 20650061 is about 4544.2338188082. The cubic root of 20650061 is about 274.3513571988.

Adding to 20650061 its reverse (16005602), we get a palindrome (36655663).

The spelling of 20650061 in words is "twenty million, six hundred fifty thousand, sixty-one".