20343212122542 has 16 divisors (see below), whose sum is σ = 41259472474752. Its totient is φ = 6685562669240.

The previous prime is 20343212122469. The next prime is 20343212122543. The reversal of 20343212122542 is 24522121234302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20343212122543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23877009108 + ... + 23877009959.

It is an arithmetic number, because the mean of its divisors is an integer number (2578717029672).

Almost surely, 2^{20343212122542} is an apocalyptic number.

20343212122542 is an abundant number, since it is smaller than the sum of its proper divisors (20916260352210).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20343212122542 is a wasteful number, since it uses less digits than its factorization.

20343212122542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47754019143.

The product of its (nonzero) digits is 46080, while the sum is 33.

Adding to 20343212122542 its reverse (24522121234302), we get a palindrome (44865333356844).

The spelling of 20343212122542 in words is "twenty trillion, three hundred forty-three billion, two hundred twelve million, one hundred twenty-two thousand, five hundred forty-two".