20423204535400 has 48 divisors (see below), whose sum is σ = 48379874165100. Its totient is φ = 8015144417280.

The previous prime is 20423204535389. The next prime is 20423204535401. The reversal of 20423204535400 is 453540232402.

It can be written as a sum of positive squares in 6 ways, for example, as 3170030689764 + 17253173845636 = 1780458^2 + 4153694^2 .

It is not an unprimeable number, because it can be changed into a prime (20423204535401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 963348105 + ... + 963369304.

Almost surely, 2^{20423204535400} is an apocalyptic number.

20423204535400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20423204535400 is an abundant number, since it is smaller than the sum of its proper divisors (27956669629700).

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

20423204535400 is a wasteful number, since it uses less digits than its factorization.

20423204535400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1926717478 (or 1926717469 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 34.

Adding to 20423204535400 its reverse (453540232402), we get a palindrome (20876744767802).

The spelling of 20423204535400 in words is "twenty trillion, four hundred twenty-three billion, two hundred four million, five hundred thirty-five thousand, four hundred".