21150023044352 has 144 divisors (see below), whose sum is σ = 43666276147200. Its totient is φ = 10219937495040.

The previous prime is 21150023044351. The next prime is 21150023044399. The reversal of 21150023044352 is 25344032005112.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21150023044351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 199537673 + ... + 199643639.

It is an arithmetic number, because the mean of its divisors is an integer number (303238028800).

Almost surely, 2^{21150023044352} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21150023044352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21833138073600).

21150023044352 is an abundant number, since it is smaller than the sum of its proper divisors (22516253102848).

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

21150023044352 is a wasteful number, since it uses less digits than its factorization.

21150023044352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106272 (or 106258 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 21150023044352 its reverse (25344032005112), we get a palindrome (46494055049464).

The spelling of 21150023044352 in words is "twenty-one trillion, one hundred fifty billion, twenty-three million, forty-four thousand, three hundred fifty-two".