20142345340521 has 24 divisors (see below), whose sum is σ = 29112411124680. Its totient is φ = 13419965558016.

The previous prime is 20142345340511. The next prime is 20142345340529. The reversal of 20142345340521 is 12504354324102.

It is a happy number.

20142345340521 is a `hidden beast` number, since 2 + 0 + 1 + 42 + 3 + 4 + 53 + 40 + 521 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 16105862530521 + 4036482810000 = 4013211^2 + 2009100^2 .

It is not a de Polignac number, because 20142345340521 - 2⁷ = 20142345340393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20142345340529) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 97899685 + ... + 98105213.

It is an arithmetic number, because the mean of its divisors is an integer number (1213017130195).

Almost surely, 2^{20142345340521} is an apocalyptic number.

It is an amenable number.

20142345340521 is a deficient number, since it is larger than the sum of its proper divisors (8970065784159).

20142345340521 is a wasteful number, since it uses less digits than its factorization.

20142345340521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212185 (or 212182 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

Adding to 20142345340521 its reverse (12504354324102), we get a palindrome (32646699664623).

The spelling of 20142345340521 in words is "twenty trillion, one hundred forty-two billion, three hundred forty-five million, three hundred forty thousand, five hundred twenty-one".