20135640216374 has 4 divisors (see below), whose sum is σ = 30203460324564. Its totient is φ = 10067820108186.

The previous prime is 20135640216361. The next prime is 20135640216397. The reversal of 20135640216374 is 47361204653102.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5033910054092 + ... + 5033910054095.

It is an arithmetic number, because the mean of its divisors is an integer number (7550865081141).

Almost surely, 2^{20135640216374} is an apocalyptic number.

20135640216374 is a deficient number, since it is larger than the sum of its proper divisors (10067820108190).

20135640216374 is a wasteful number, since it uses less digits than its factorization.

20135640216374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10067820108189.

The product of its (nonzero) digits is 725760, while the sum is 44.

Adding to 20135640216374 its reverse (47361204653102), we get a palindrome (67496844869476).

The spelling of 20135640216374 in words is "twenty trillion, one hundred thirty-five billion, six hundred forty million, two hundred sixteen thousand, three hundred seventy-four".