20012342135 has 16 divisors (see below), whose sum is σ = 25330713600. Its totient is φ = 15136069536.

The previous prime is 20012342099. The next prime is 20012342227. The reversal of 20012342135 is 53124321002.

It is a cyclic number.

It is not a de Polignac number, because 20012342135 - 2⁸ = 20012341879 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20012342135.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170015 + ... + 262544.

It is an arithmetic number, because the mean of its divisors is an integer number (1583169600).

Almost surely, 2^20012342135 is an apocalyptic number.

20012342135 is a deficient number, since it is larger than the sum of its proper divisors (5318371465).

20012342135 is a wasteful number, since it uses less digits than its factorization.

20012342135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433070.

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 20012342135 its reverse (53124321002), we get a palindrome (73136663137).

The spelling of 20012342135 in words is "twenty billion, twelve million, three hundred forty-two thousand, one hundred thirty-five".