21356267673400 has 192 divisors, whose sum is σ = 56156968224000. Its totient is φ = 7485217152000.

The previous prime is 21356267673343. The next prime is 21356267673431. The reversal of 21356267673400 is 437676265312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6060301 + ... + 8912899.

It is an arithmetic number, because the mean of its divisors is an integer number (292484209500).

Almost surely, 2^{21356267673400} is an apocalyptic number.

21356267673400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21356267673400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28078484112000).

21356267673400 is an abundant number, since it is smaller than the sum of its proper divisors (34800700550600).

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

21356267673400 is a wasteful number, since it uses less digits than its factorization.

21356267673400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2852750 (or 2852741 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 52.

The spelling of 21356267673400 in words is "twenty-one trillion, three hundred fifty-six billion, two hundred sixty-seven million, six hundred seventy-three thousand, four hundred".