20136501 has 48 divisors (see below), whose sum is σ = 37065600. Its totient is φ = 10442880.

The previous prime is 20136499. The next prime is 20136503. The reversal of 20136501 is 10563102.

20136501 is a `hidden beast` number, since 2 + 0 + 13 + 650 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (20136499) and next prime (20136503).

It is not a de Polignac number, because 20136501 - 2¹ = 20136499 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20136503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 33661 + ... + 34253.

It is an arithmetic number, because the mean of its divisors is an integer number (772200).

Almost surely, 2^20136501 is an apocalyptic number.

20136501 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20136501 is a deficient number, since it is larger than the sum of its proper divisors (16929099).

20136501 is a wasteful number, since it uses less digits than its factorization.

20136501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631 (or 614 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 20136501 is about 4487.3712794909. The cubic root of 20136501 is about 272.0578965928.

Adding to 20136501 its reverse (10563102), we get a palindrome (30699603).

The spelling of 20136501 in words is "twenty million, one hundred thirty-six thousand, five hundred one".