20423340052 has 12 divisors (see below), whose sum is σ = 35753357556. Its totient is φ = 10208095040.

The previous prime is 20423340023. The next prime is 20423340053. The reversal of 20423340052 is 25004332402.

It can be written as a sum of positive squares in 2 ways, for example, as 16888561936 + 3534778116 = 129956^2 + 59454^2 .

It is a super-2 number, since 2×20423340052² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20423339999 and 20423340026.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20423340053) 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 3 ways as a sum of consecutive naturals, for example, 880873 + ... + 903760.

It is an arithmetic number, because the mean of its divisors is an integer number (2979446463).

Almost surely, 2^20423340052 is an apocalyptic number.

It is an amenable number.

20423340052 is a deficient number, since it is larger than the sum of its proper divisors (15330017504).

20423340052 is a wasteful number, since it uses less digits than its factorization.

20423340052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1787498 (or 1787496 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 25.

Adding to 20423340052 its reverse (25004332402), we get a palindrome (45427672454).

The spelling of 20423340052 in words is "twenty billion, four hundred twenty-three million, three hundred forty thousand, fifty-two".