21355352150320 has 40 divisors (see below), whose sum is σ = 49665923298000. Its totient is φ = 8539606744320.

The previous prime is 21355352150243. The next prime is 21355352150381. The reversal of 21355352150320 is 2305125355312.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×21355352150320² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21355352150320.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39324195 + ... + 39863554.

It is an arithmetic number, because the mean of its divisors is an integer number (1241648082450).

Almost surely, 2^{21355352150320} is an apocalyptic number.

21355352150320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21355352150320 is an abundant number, since it is smaller than the sum of its proper divisors (28310571147680).

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

21355352150320 is a wasteful number, since it uses less digits than its factorization.

21355352150320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79191133 (or 79191127 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 37.

The spelling of 21355352150320 in words is "twenty-one trillion, three hundred fifty-five billion, three hundred fifty-two million, one hundred fifty thousand, three hundred twenty".