21723331461 has 8 divisors (see below), whose sum is σ = 31192476000. Its totient is φ = 13368203952.

The previous prime is 21723331453. The next prime is 21723331463. The reversal of 21723331461 is 16413332712.

It is a happy number.

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

It is not a de Polignac number, because 21723331461 - 2³ = 21723331453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21723331463) 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, 278504211 + ... + 278504288.

It is an arithmetic number, because the mean of its divisors is an integer number (3899059500).

Almost surely, 2^21723331461 is an apocalyptic number.

It is an amenable number.

21723331461 is a deficient number, since it is larger than the sum of its proper divisors (9469144539).

21723331461 is a wasteful number, since it uses less digits than its factorization.

21723331461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557008515.

The product of its digits is 18144, while the sum is 33.

The spelling of 21723331461 in words is "twenty-one billion, seven hundred twenty-three million, three hundred thirty-one thousand, four hundred sixty-one".