21474216276 has 24 divisors (see below), whose sum is σ = 51051911904. Its totient is φ = 7023013920.

The previous prime is 21474216263. The next prime is 21474216277. The reversal of 21474216276 is 67261247412.

It is a super-2 number, since 2×21474216276² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21474216277) 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, 16881610 + ... + 16882881.

It is an arithmetic number, because the mean of its divisors is an integer number (2127162996).

Almost surely, 2^21474216276 is an apocalyptic number.

It is an amenable number.

21474216276 is an abundant number, since it is smaller than the sum of its proper divisors (29577695628).

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

21474216276 is a wasteful number, since it uses less digits than its factorization.

21474216276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33764551 (or 33764549 counting only the distinct ones).

The product of its digits is 225792, while the sum is 42.

The spelling of 21474216276 in words is "twenty-one billion, four hundred seventy-four million, two hundred sixteen thousand, two hundred seventy-six".