21404776601 has 8 divisors (see below), whose sum is σ = 23055414144. Its totient is φ = 19754727120.

The previous prime is 21404776579. The next prime is 21404776637. The reversal of 21404776601 is 10667740412.

It is a happy number.

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 21404776601 - 2¹⁴ = 21404760217 is a prime.

It is a super-2 number, since 2×21404776601² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21404776681) 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, 69911 + ... + 218396.

It is an arithmetic number, because the mean of its divisors is an integer number (2881926768).

Almost surely, 2^21404776601 is an apocalyptic number.

It is an amenable number.

21404776601 is a deficient number, since it is larger than the sum of its proper divisors (1650637543).

21404776601 is a wasteful number, since it uses less digits than its factorization.

21404776601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294031.

The product of its (nonzero) digits is 56448, while the sum is 38.

The spelling of 21404776601 in words is "twenty-one billion, four hundred four million, seven hundred seventy-six thousand, six hundred one".