21374443203252 has 96 divisors (see below), whose sum is σ = 52856525568000. Its totient is φ = 6703818878592.

The previous prime is 21374443203101. The next prime is 21374443203263. The reversal of 21374443203252 is 25230234447312.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 391567953 + ... + 391622535.

It is an arithmetic number, because the mean of its divisors is an integer number (550588808000).

Almost surely, 2^{21374443203252} 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 21374443203252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26428262784000).

21374443203252 is an abundant number, since it is smaller than the sum of its proper divisors (31482082364748).

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

21374443203252 is a wasteful number, since it uses less digits than its factorization.

21374443203252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66285 (or 66283 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 42.

The spelling of 21374443203252 in words is "twenty-one trillion, three hundred seventy-four billion, four hundred forty-three million, two hundred three thousand, two hundred fifty-two".