21791454067 has 8 divisors (see below), whose sum is σ = 21867927120. Its totient is φ = 21715025280.

The previous prime is 21791454031. The next prime is 21791454127. The reversal of 21791454067 is 76045419712.

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

It is a cyclic number.

It is not a de Polignac number, because 21791454067 - 2⁷ = 21791453939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21791454017) 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, 1205784 + ... + 1223722.

It is an arithmetic number, because the mean of its divisors is an integer number (2733490890).

Almost surely, 2^21791454067 is an apocalyptic number.

21791454067 is a deficient number, since it is larger than the sum of its proper divisors (76473053).

21791454067 is a wasteful number, since it uses less digits than its factorization.

21791454067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22133.

The product of its (nonzero) digits is 423360, while the sum is 46.

The spelling of 21791454067 in words is "twenty-one billion, seven hundred ninety-one million, four hundred fifty-four thousand, sixty-seven".