21273216362000 has 80 divisors (see below), whose sum is σ = 51614197073712. Its totient is φ = 8480244377600.

The previous prime is 21273216361993. The next prime is 21273216362081. The reversal of 21273216362000 is 26361237212.

It can be written as a sum of positive squares in 8 ways, for example, as 2774649769984 + 18498566592016 = 1665728^2 + 4300996^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17565209 + ... + 18737208.

Almost surely, 2^{21273216362000} is an apocalyptic number.

21273216362000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21273216362000 is an abundant number, since it is smaller than the sum of its proper divisors (30340980711712).

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

21273216362000 is a wasteful number, since it uses less digits than its factorization.

21273216362000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36302733 (or 36302717 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 35.

Adding to 21273216362000 its reverse (26361237212), we get a palindrome (21299577599212).

The spelling of 21273216362000 in words is "twenty-one trillion, two hundred seventy-three billion, two hundred sixteen million, three hundred sixty-two thousand".