20650757 has 16 divisors (see below), whose sum is σ = 22498560. Its totient is φ = 18902400.

The previous prime is 20650753. The next prime is 20650769. The reversal of 20650757 is 75705602.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20650757 - 2² = 20650753 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 (20650753) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57344 + ... + 57702.

It is an arithmetic number, because the mean of its divisors is an integer number (1406160).

Almost surely, 2^20650757 is an apocalyptic number.

It is an amenable number.

20650757 is a deficient number, since it is larger than the sum of its proper divisors (1847803).

20650757 is a wasteful number, since it uses less digits than its factorization.

20650757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484.

The product of its (nonzero) digits is 14700, while the sum is 32.

The square root of 20650757 is about 4544.3103987294. The cubic root of 20650757 is about 274.3544394561.

The spelling of 20650757 in words is "twenty million, six hundred fifty thousand, seven hundred fifty-seven".