20423133342 has 32 divisors (see below), whose sum is σ = 45716032800. Its totient is φ = 6758017344.

The previous prime is 20423133331. The next prime is 20423133347. The reversal of 20423133342 is 24333132402.

20423133342 is a `hidden beast` number, since 2 + 0 + 4 + 2 + 313 + 3 + 342 = 666.

It is a super-2 number, since 2×20423133342² (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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (20423133347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1372917 + ... + 1387712.

It is an arithmetic number, because the mean of its divisors is an integer number (1428626025).

Almost surely, 2^20423133342 is an apocalyptic number.

20423133342 is an abundant number, since it is smaller than the sum of its proper divisors (25292899458).

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

20423133342 is a wasteful number, since it uses less digits than its factorization.

20423133342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2760777 (or 2760771 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 27.

Adding to 20423133342 its reverse (24333132402), we get a palindrome (44756265744).

The spelling of 20423133342 in words is "twenty billion, four hundred twenty-three million, one hundred thirty-three thousand, three hundred forty-two".