21102814305 has 32 divisors (see below), whose sum is σ = 37522896000. Its totient is φ = 11252799936.

The previous prime is 21102814277. The next prime is 21102814333. The reversal of 21102814305 is 50341820112.

It is an interprime number because it is at equal distance from previous prime (21102814277) and next prime (21102814333).

It is not a de Polignac number, because 21102814305 - 2⁵ = 21102814273 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1008762 + ... + 1029468.

It is an arithmetic number, because the mean of its divisors is an integer number (1172590500).

Almost surely, 2^21102814305 is an apocalyptic number.

It is an amenable number.

21102814305 is a deficient number, since it is larger than the sum of its proper divisors (16420081695).

21102814305 is a wasteful number, since it uses less digits than its factorization.

21102814305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28270 (or 28264 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The spelling of 21102814305 in words is "twenty-one billion, one hundred two million, eight hundred fourteen thousand, three hundred five".