20135236015 has 8 divisors (see below), whose sum is σ = 24453395568. Its totient is φ = 15914113920.

The previous prime is 20135236003. The next prime is 20135236103. The reversal of 20135236015 is 51063253102.

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

It is a de Polignac number, because none of the positive numbers 2^k-20135236015 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24258906 + ... + 24259735.

It is an arithmetic number, because the mean of its divisors is an integer number (3056674446).

Almost surely, 2^20135236015 is an apocalyptic number.

20135236015 is a deficient number, since it is larger than the sum of its proper divisors (4318159553).

20135236015 is an equidigital number, since it uses as much as digits as its factorization.

20135236015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48518729.

The product of its (nonzero) digits is 5400, while the sum is 28.

Adding to 20135236015 its reverse (51063253102), we get a palindrome (71198489117).

The spelling of 20135236015 in words is "twenty billion, one hundred thirty-five million, two hundred thirty-six thousand, fifteen".