21876276258 has 64 divisors (see below), whose sum is σ = 50758444800. Its totient is φ = 6970803840.

The previous prime is 21876276211. The next prime is 21876276263. The reversal of 21876276258 is 85267267812.

21876276258 is a `hidden beast` number, since 2 + 1 + 8 + 7 + 6 + 2 + 7 + 625 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon 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 31 ways as a sum of consecutive naturals, for example, 2515678 + ... + 2524358.

It is an arithmetic number, because the mean of its divisors is an integer number (793100700).

Almost surely, 2^21876276258 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21876276258, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25379222400).

21876276258 is an abundant number, since it is smaller than the sum of its proper divisors (28882168542).

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

21876276258 is a wasteful number, since it uses less digits than its factorization.

21876276258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10744 (or 10738 counting only the distinct ones).

The product of its digits is 4515840, while the sum is 54.

The spelling of 21876276258 in words is "twenty-one billion, eight hundred seventy-six million, two hundred seventy-six thousand, two hundred fifty-eight".