21467585201 has 4 divisors (see below), whose sum is σ = 21622028400. Its totient is φ = 21313142004.

The previous prime is 21467585177. The next prime is 21467585203. The reversal of 21467585201 is 10258576412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21467585201 - 2¹⁸ = 21467323057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21467585203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77221391 + ... + 77221668.

It is an arithmetic number, because the mean of its divisors is an integer number (5405507100).

Almost surely, 2^21467585201 is an apocalyptic number.

It is an amenable number.

21467585201 is a deficient number, since it is larger than the sum of its proper divisors (154443199).

21467585201 is a wasteful number, since it uses less digits than its factorization.

21467585201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154443198.

The product of its (nonzero) digits is 134400, while the sum is 41.

The spelling of 21467585201 in words is "twenty-one billion, four hundred sixty-seven million, five hundred eighty-five thousand, two hundred one".