21028174882 has 64 divisors (see below), whose sum is σ = 38453345280. Its totient is φ = 8493465600.

The previous prime is 21028174877. The next prime is 21028174897. The reversal of 21028174882 is 28847182012.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1704994 + ... + 1717282.

It is an arithmetic number, because the mean of its divisors is an integer number (600833520).

Almost surely, 2^21028174882 is an apocalyptic number.

21028174882 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21028174882 is a deficient number, since it is larger than the sum of its proper divisors (17425170398).

21028174882 is a wasteful number, since it uses less digits than its factorization.

21028174882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12539.

The product of its (nonzero) digits is 114688, while the sum is 43.

The spelling of 21028174882 in words is "twenty-one billion, twenty-eight million, one hundred seventy-four thousand, eight hundred eighty-two".