21072326801 has 4 divisors (see below), whose sum is σ = 21073938432. Its totient is φ = 21070715172.

The previous prime is 21072326741. The next prime is 21072326819. The reversal of 21072326801 is 10862327012.

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 21072326801 - 2¹⁴ = 21072310417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21072326201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 786041 + ... + 812406.

It is an arithmetic number, because the mean of its divisors is an integer number (5268484608).

Almost surely, 2^21072326801 is an apocalyptic number.

It is an amenable number.

21072326801 is a deficient number, since it is larger than the sum of its proper divisors (1611631).

21072326801 is a wasteful number, since it uses less digits than its factorization.

21072326801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1611630.

The product of its (nonzero) digits is 8064, while the sum is 32.

The spelling of 21072326801 in words is "twenty-one billion, seventy-two million, three hundred twenty-six thousand, eight hundred one".