21471048276 has 24 divisors (see below), whose sum is σ = 50262310560. Its totient is φ = 7133702112.

The previous prime is 21471048199. The next prime is 21471048289. The reversal of 21471048276 is 67284017412.

It is a super-2 number, since 2×21471048276² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 2910411 + ... + 2917778.

It is an arithmetic number, because the mean of its divisors is an integer number (2094262940).

Almost surely, 2^21471048276 is an apocalyptic number.

It is an amenable number.

21471048276 is an abundant number, since it is smaller than the sum of its proper divisors (28791262284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21471048276 is a wasteful number, since it uses less digits than its factorization.

21471048276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5828503 (or 5828501 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 42.

The spelling of 21471048276 in words is "twenty-one billion, four hundred seventy-one million, forty-eight thousand, two hundred seventy-six".