20423333340 has 72 divisors (see below), whose sum is σ = 62271872208. Its totient is φ = 5417994240.

The previous prime is 20423333327. The next prime is 20423333347. The reversal of 20423333340 is 4333332402.

It is a super-2 number, since 2×20423333340² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20423333347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 259206 + ... + 328685.

It is an arithmetic number, because the mean of its divisors is an integer number (864887114).

Almost surely, 2^20423333340 is an apocalyptic number.

20423333340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20423333340 is an abundant number, since it is smaller than the sum of its proper divisors (41848538868).

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

20423333340 is a wasteful number, since it uses less digits than its factorization.

20423333340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588099 (or 588094 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 27.

Adding to 20423333340 its reverse (4333332402), we get a palindrome (24756665742).

The spelling of 20423333340 in words is "twenty billion, four hundred twenty-three million, three hundred thirty-three thousand, three hundred forty".