21794475601 has 4 divisors (see below), whose sum is σ = 21795282432. Its totient is φ = 21793668772.

The previous prime is 21794475583. The next prime is 21794475623. The reversal of 21794475601 is 10657449712.

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 21794475601 - 2¹⁹ = 21793951313 is a prime.

It is a super-2 number, since 2×21794475601² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21794475641) 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, 361441 + ... + 417406.

It is an arithmetic number, because the mean of its divisors is an integer number (5448820608).

Almost surely, 2^21794475601 is an apocalyptic number.

It is an amenable number.

21794475601 is a deficient number, since it is larger than the sum of its proper divisors (806831).

21794475601 is an equidigital number, since it uses as much as digits as its factorization.

21794475601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806830.

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

The spelling of 21794475601 in words is "twenty-one billion, seven hundred ninety-four million, four hundred seventy-five thousand, six hundred one".