20136502 has 8 divisors (see below), whose sum is σ = 30774816. Its totient is φ = 9878232.

The previous prime is 20136499. The next prime is 20136503. The reversal of 20136502 is 20563102.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20136502.

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 3 ways as a sum of consecutive naturals, for example, 94878 + ... + 95089.

It is an arithmetic number, because the mean of its divisors is an integer number (3846852).

Almost surely, 2^20136502 is an apocalyptic number.

20136502 is a deficient number, since it is larger than the sum of its proper divisors (10638314).

20136502 is a wasteful number, since it uses less digits than its factorization.

20136502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190022.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 20136502 is about 4487.3713909147. The cubic root of 20136502 is about 272.0579010963.

Adding to 20136502 its reverse (20563102), we get a palindrome (40699604).

It can be divided in two parts, 2013 and 6502, that added together give a triangular number (8515 = T₁₃₀).

The spelling of 20136502 in words is "twenty million, one hundred thirty-six thousand, five hundred two".