20323205452 has 24 divisors (see below), whose sum is σ = 40136740560. Its totient is φ = 8919274560.

The previous prime is 20323205437. The next prime is 20323205453. The reversal of 20323205452 is 25450232302.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20323205452.

It is not an unprimeable number, because it can be changed into a prime (20323205453) 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 7 ways as a sum of consecutive naturals, for example, 7962363 + ... + 7964914.

It is an arithmetic number, because the mean of its divisors is an integer number (1672364190).

Almost surely, 2^20323205452 is an apocalyptic number.

20323205452 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20323205452 is a deficient number, since it is larger than the sum of its proper divisors (19813535108).

20323205452 is a wasteful number, since it uses less digits than its factorization.

20323205452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15927321 (or 15927319 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 28.

Adding to 20323205452 its reverse (25450232302), we get a palindrome (45773437754).

The spelling of 20323205452 in words is "twenty billion, three hundred twenty-three million, two hundred five thousand, four hundred fifty-two".