20650575 has 24 divisors (see below), whose sum is σ = 37247616. Its totient is φ = 10012000.

The previous prime is 20650571. The next prime is 20650577. The reversal of 20650575 is 57505602.

It is not a de Polignac number, because 20650575 - 2² = 20650571 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20650571) 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, 11691 + ... + 13340.

It is an arithmetic number, because the mean of its divisors is an integer number (1551984).

Almost surely, 2^20650575 is an apocalyptic number.

20650575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20650575 is a deficient number, since it is larger than the sum of its proper divisors (16597041).

20650575 is a wasteful number, since it uses less digits than its factorization.

20650575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25055 (or 25050 counting only the distinct ones).

The product of its (nonzero) digits is 10500, while the sum is 30.

The square root of 20650575 is about 4544.2903736447. The cubic root of 20650575 is about 274.3536334702.

The spelling of 20650575 in words is "twenty million, six hundred fifty thousand, five hundred seventy-five".