21917341051 has 8 divisors (see below), whose sum is σ = 22173782400. Its totient is φ = 21661126080.

The previous prime is 21917341037. The next prime is 21917341091. The reversal of 21917341051 is 15014371912.

It is a happy number.

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-21917341051 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21917340998 and 21917341016.

It is not an unprimeable number, because it can be changed into a prime (21917341091) 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, 142230 + ... + 253108.

It is an arithmetic number, because the mean of its divisors is an integer number (2771722800).

Almost surely, 2^21917341051 is an apocalyptic number.

21917341051 is a deficient number, since it is larger than the sum of its proper divisors (256441349).

21917341051 is a wasteful number, since it uses less digits than its factorization.

21917341051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113189.

The product of its (nonzero) digits is 7560, while the sum is 34.

The spelling of 21917341051 in words is "twenty-one billion, nine hundred seventeen million, three hundred forty-one thousand, fifty-one".