21249808659076 has 24 divisors (see below), whose sum is σ = 38420919665856. Its totient is φ = 10275842077920.

The previous prime is 21249808659047. The next prime is 21249808659091. The reversal of 21249808659076 is 67095680894212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 429854890 + ... + 429904321.

It is an arithmetic number, because the mean of its divisors is an integer number (1600871652744).

Almost surely, 2^{21249808659076} is an apocalyptic number.

It is an amenable number.

21249808659076 is a deficient number, since it is larger than the sum of its proper divisors (17171111006780).

21249808659076 is a wasteful number, since it uses less digits than its factorization.

21249808659076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 859759419 (or 859759417 counting only the distinct ones).

The product of its (nonzero) digits is 104509440, while the sum is 67.

The spelling of 21249808659076 in words is "twenty-one trillion, two hundred forty-nine billion, eight hundred eight million, six hundred fifty-nine thousand, seventy-six".