21733492481 has 8 divisors (see below), whose sum is σ = 22002677760. Its totient is φ = 21464482032.

The previous prime is 21733492471. The next prime is 21733492483. The reversal of 21733492481 is 18429433712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21733492481 is a prime.

It is a super-2 number, since 2×21733492481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21733492483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 215936 + ... + 300158.

It is an arithmetic number, because the mean of its divisors is an integer number (2750334720).

Almost surely, 2^21733492481 is an apocalyptic number.

It is an amenable number.

21733492481 is a deficient number, since it is larger than the sum of its proper divisors (269185279).

21733492481 is an equidigital number, since it uses as much as digits as its factorization.

21733492481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87415.

The product of its digits is 290304, while the sum is 44.

The spelling of 21733492481 in words is "twenty-one billion, seven hundred thirty-three million, four hundred ninety-two thousand, four hundred eighty-one".