21440554150204 has 48 divisors (see below), whose sum is σ = 44938833956800. Its totient is φ = 8940462713280.

The previous prime is 21440554150201. The next prime is 21440554150247. The reversal of 21440554150204 is 40205145504412.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21440554150201) 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 15 ways as a sum of consecutive naturals, for example, 211127967 + ... + 211229494.

Almost surely, 2^{21440554150204} is an apocalyptic number.

It is an amenable number.

21440554150204 is an abundant number, since it is smaller than the sum of its proper divisors (23498279806596).

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

21440554150204 is a wasteful number, since it uses less digits than its factorization.

21440554150204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422357523 (or 422357507 counting only the distinct ones).

The product of its (nonzero) digits is 128000, while the sum is 37.

Adding to 21440554150204 its reverse (40205145504412), we get a palindrome (61645699654616).

The spelling of 21440554150204 in words is "twenty-one trillion, four hundred forty billion, five hundred fifty-four million, one hundred fifty thousand, two hundred four".