20823330042 has 32 divisors (see below), whose sum is σ = 46316612160. Its totient is φ = 6934728240.

The previous prime is 20823330037. The next prime is 20823330053. The reversal of 20823330042 is 24003332802.

It is a super-2 number, since 2×20823330042² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 20823329988 and 20823330015.

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, 117813 + ... + 235640.

It is an arithmetic number, because the mean of its divisors is an integer number (1447394130).

Almost surely, 2^20823330042 is an apocalyptic number.

20823330042 is an abundant number, since it is smaller than the sum of its proper divisors (25493282118).

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

20823330042 is a wasteful number, since it uses less digits than its factorization.

20823330042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354555 (or 354549 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 20823330042 its reverse (24003332802), we get a palindrome (44826662844).

The spelling of 20823330042 in words is "twenty billion, eight hundred twenty-three million, three hundred thirty thousand, forty-two".