21467608091 has 8 divisors (see below), whose sum is σ = 21560941584. Its totient is φ = 21374411680.

The previous prime is 21467608021. The next prime is 21467608111. The reversal of 21467608091 is 19080676412.

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 21467608091 - 2¹⁰ = 21467607067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21467608021) 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, 286085 + ... + 353241.

It is an arithmetic number, because the mean of its divisors is an integer number (2695117698).

Almost surely, 2^21467608091 is an apocalyptic number.

21467608091 is a deficient number, since it is larger than the sum of its proper divisors (93333493).

21467608091 is a wasteful number, since it uses less digits than its factorization.

21467608091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68541.

The product of its (nonzero) digits is 145152, while the sum is 44.

The spelling of 21467608091 in words is "twenty-one billion, four hundred sixty-seven million, six hundred eight thousand, ninety-one".