21471048277 has 8 divisors (see below), whose sum is σ = 24874483136. Its totient is φ = 18151648992.

The previous prime is 21471048199. The next prime is 21471048289. The reversal of 21471048277 is 77284017412.

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 21471048277 - 2⁷ = 21471048149 is a prime.

It is a super-2 number, since 2×21471048277² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21471048377) 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, 21008343 + ... + 21009364.

It is an arithmetic number, because the mean of its divisors is an integer number (3109310392).

Almost surely, 2^21471048277 is an apocalyptic number.

It is an amenable number.

21471048277 is a deficient number, since it is larger than the sum of its proper divisors (3403434859).

21471048277 is an equidigital number, since it uses as much as digits as its factorization.

21471048277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42017787.

The product of its (nonzero) digits is 175616, while the sum is 43.

The spelling of 21471048277 in words is "twenty-one billion, four hundred seventy-one million, forty-eight thousand, two hundred seventy-seven".