21016382876 has 12 divisors (see below), whose sum is σ = 37772688408. Its totient is φ = 10224186192.

The previous prime is 21016382867. The next prime is 21016382879. The reversal of 21016382876 is 67828361012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21016382879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71001146 + ... + 71001441.

It is an arithmetic number, because the mean of its divisors is an integer number (3147724034).

Almost surely, 2^21016382876 is an apocalyptic number.

It is an amenable number.

21016382876 is a deficient number, since it is larger than the sum of its proper divisors (16756305532).

21016382876 is a wasteful number, since it uses less digits than its factorization.

21016382876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142002628 (or 142002626 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 44.

The spelling of 21016382876 in words is "twenty-one billion, sixteen million, three hundred eighty-two thousand, eight hundred seventy-six".