20650137 has 16 divisors (see below), whose sum is σ = 28357632. Its totient is φ = 13361040.

The previous prime is 20650129. The next prime is 20650139. The reversal of 20650137 is 73105602.

It is not a de Polignac number, because 20650137 - 2³ = 20650129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20650139) 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, 13548 + ... + 14994.

It is an arithmetic number, because the mean of its divisors is an integer number (1772352).

Almost surely, 2^20650137 is an apocalyptic number.

It is an amenable number.

20650137 is a deficient number, since it is larger than the sum of its proper divisors (7707495).

20650137 is a wasteful number, since it uses less digits than its factorization.

20650137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1588.

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 20650137 is about 4544.2421810463. The cubic root of 20650137 is about 274.3516937705.

Adding to 20650137 its reverse (73105602), we get a palindrome (93755739).

The spelling of 20650137 in words is "twenty million, six hundred fifty thousand, one hundred thirty-seven".