21670801051 has 8 divisors (see below), whose sum is σ = 23045757120. Its totient is φ = 20306978688.

The previous prime is 21670801049. The next prime is 21670801093. The reversal of 21670801051 is 15010807612.

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 21670801051 - 2¹ = 21670801049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21670801001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2779411 + ... + 2787196.

It is an arithmetic number, because the mean of its divisors is an integer number (2880719640).

Almost surely, 2^21670801051 is an apocalyptic number.

21670801051 is a deficient number, since it is larger than the sum of its proper divisors (1374956069).

21670801051 is a wasteful number, since it uses less digits than its factorization.

21670801051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5566853.

The product of its (nonzero) digits is 3360, while the sum is 31.

The spelling of 21670801051 in words is "twenty-one billion, six hundred seventy million, eight hundred one thousand, fifty-one".