20423433042 has 64 divisors (see below), whose sum is σ = 45888197760. Its totient is φ = 6732614592.

The previous prime is 20423433007. The next prime is 20423433091. The reversal of 20423433042 is 24033432402.

20423433042 is a `hidden beast` number, since 204 + 23 + 433 + 0 + 4 + 2 = 666.

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 = 20423432997 and 20423433015.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3770328 + ... + 3775740.

It is an arithmetic number, because the mean of its divisors is an integer number (717003090).

Almost surely, 2^20423433042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20423433042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22944098880).

20423433042 is an abundant number, since it is smaller than the sum of its proper divisors (25464764718).

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

20423433042 is a wasteful number, since it uses less digits than its factorization.

20423433042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6184 (or 6178 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 27.

Adding to 20423433042 its reverse (24033432402), we get a palindrome (44456865444).

The spelling of 20423433042 in words is "twenty billion, four hundred twenty-three million, four hundred thirty-three thousand, forty-two".