20321440421200 has 30 divisors (see below), whose sum is σ = 48822260612894. Its totient is φ = 8128576168320.

The previous prime is 20321440421197. The next prime is 20321440421327. The reversal of 20321440421200 is 212404412302.

It can be written as a sum of positive squares in 3 ways, for example, as 1272510339136 + 19048930082064 = 1128056^2 + 4364508^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 25401800127 + ... + 25401800926.

Almost surely, 2^{20321440421200} is an apocalyptic number.

20321440421200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20321440421200 is an abundant number, since it is smaller than the sum of its proper divisors (28500820191694).

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

20321440421200 is a wasteful number, since it uses less digits than its factorization.

20321440421200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50803601071 (or 50803601060 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 20321440421200 its reverse (212404412302), we get a palindrome (20533844833502).

The spelling of 20321440421200 in words is "twenty trillion, three hundred twenty-one billion, four hundred forty million, four hundred twenty-one thousand, two hundred".