20400102313242 has 32 divisors (see below), whose sum is σ = 43603957029312. Its totient is φ = 6340218710784.

The previous prime is 20400102313229. The next prime is 20400102313363. The reversal of 20400102313242 is 24231320100402.

It is a happy 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, 934573213 + ... + 934595040.

It is an arithmetic number, because the mean of its divisors is an integer number (1362623657166).

Almost surely, 2^{20400102313242} is an apocalyptic number.

20400102313242 is an abundant number, since it is smaller than the sum of its proper divisors (23203854716070).

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

20400102313242 is a wasteful number, since it uses less digits than its factorization.

20400102313242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1869168382.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 20400102313242 its reverse (24231320100402), we get a palindrome (44631422413644).

The spelling of 20400102313242 in words is "twenty trillion, four hundred billion, one hundred two million, three hundred thirteen thousand, two hundred forty-two".