20342142243351 has 12 divisors (see below), whose sum is σ = 29796940751760. Its totient is φ = 13370422131360.

The previous prime is 20342142243337. The next prime is 20342142243359. The reversal of 20342142243351 is 15334224124302.

20342142243351 is a `hidden beast` number, since 2 + 0 + 3 + 4 + 21 + 42 + 243 + 351 = 666.

It is not a de Polignac number, because 20342142243351 - 2¹³ = 20342142235159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20342142243359) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15917168566 + ... + 15917169843.

It is an arithmetic number, because the mean of its divisors is an integer number (2483078395980).

Almost surely, 2^{20342142243351} is an apocalyptic number.

20342142243351 is a deficient number, since it is larger than the sum of its proper divisors (9454798508409).

20342142243351 is a wasteful number, since it uses less digits than its factorization.

20342142243351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31834338486 (or 31834338483 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 36.

Adding to 20342142243351 its reverse (15334224124302), we get a palindrome (35676366367653).

The spelling of 20342142243351 in words is "twenty trillion, three hundred forty-two billion, one hundred forty-two million, two hundred forty-three thousand, three hundred fifty-one".