21365073272620 has 96 divisors (see below), whose sum is σ = 57742086721536. Its totient is φ = 6444429292800.

The previous prime is 21365073272549. The next prime is 21365073272729. The reversal of 21365073272620 is 2627237056312.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 223717167 + ... + 223812646.

It is an arithmetic number, because the mean of its divisors is an integer number (601480070016).

Almost surely, 2^{21365073272620} is an apocalyptic number.

21365073272620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21365073272620 is an abundant number, since it is smaller than the sum of its proper divisors (36377013448916).

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

21365073272620 is a wasteful number, since it uses less digits than its factorization.

21365073272620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447529871 (or 447529869 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 46.

The spelling of 21365073272620 in words is "twenty-one trillion, three hundred sixty-five billion, seventy-three million, two hundred seventy-two thousand, six hundred twenty".