20324100042 has 32 divisors (see below), whose sum is σ = 45211296960. Its totient is φ = 6767705520.

The previous prime is 20324100023. The next prime is 20324100053. The reversal of 20324100042 is 24000142302.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20324099988 and 20324100024.

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 15 ways as a sum of consecutive naturals, for example, 141373 + ... + 246240.

It is an arithmetic number, because the mean of its divisors is an integer number (1412853030).

Almost surely, 2^20324100042 is an apocalyptic number.

20324100042 is an abundant number, since it is smaller than the sum of its proper divisors (24887196918).

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

20324100042 is a wasteful number, since it uses less digits than its factorization.

20324100042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388595 (or 388589 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 20324100042 its reverse (24000142302), we get a palindrome (44324242344).

The spelling of 20324100042 in words is "twenty billion, three hundred twenty-four million, one hundred thousand, forty-two".