20213142342402 has 16 divisors (see below), whose sum is σ = 40826544930432. Its totient is φ = 6671004073200.

The previous prime is 20213142342391. The next prime is 20213142342443. The reversal of 20213142342402 is 20424324131202.

It is a super-2 number, since 2×20213142342402² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20213142342402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16677509578 + ... + 16677510789.

It is an arithmetic number, because the mean of its divisors is an integer number (2551659058152).

Almost surely, 2^{20213142342402} is an apocalyptic number.

20213142342402 is an abundant number, since it is smaller than the sum of its proper divisors (20613402588030).

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

20213142342402 is a wasteful number, since it uses less digits than its factorization.

20213142342402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33355020473.

The product of its (nonzero) digits is 18432, while the sum is 30.

Adding to 20213142342402 its reverse (20424324131202), we get a palindrome (40637466473604).

The spelling of 20213142342402 in words is "twenty trillion, two hundred thirteen billion, one hundred forty-two million, three hundred forty-two thousand, four hundred two".