21751334067 has 8 divisors (see below), whose sum is σ = 29477218000. Its totient is φ = 14263169760.

The previous prime is 21751333993. The next prime is 21751334081. The reversal of 21751334067 is 76043315712.

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

It is not a de Polignac number, because 21751334067 - 2⁸ = 21751333811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21751334167) 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, 59429692 + ... + 59430057.

It is an arithmetic number, because the mean of its divisors is an integer number (3684652250).

Almost surely, 2^21751334067 is an apocalyptic number.

21751334067 is a deficient number, since it is larger than the sum of its proper divisors (7725883933).

21751334067 is a wasteful number, since it uses less digits than its factorization.

21751334067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118859813.

The product of its (nonzero) digits is 105840, while the sum is 39.

Adding to 21751334067 its reverse (76043315712), we get a palindrome (97794649779).

The spelling of 21751334067 in words is "twenty-one billion, seven hundred fifty-one million, three hundred thirty-four thousand, sixty-seven".