21298616362828 has 24 divisors (see below), whose sum is σ = 42817943786912. Its totient is φ = 9080683213824.

The previous prime is 21298616362817. The next prime is 21298616362841. The reversal of 21298616362828 is 82826361689212.

It is a self number, because there is not a number n which added to its sum of digits gives 21298616362828.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1970628975 + ... + 1970639782.

Almost surely, 2^{21298616362828} is an apocalyptic number.

21298616362828 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21298616362828 is an abundant number, since it is smaller than the sum of its proper divisors (21519327424084).

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

21298616362828 is a wasteful number, since it uses less digits than its factorization.

21298616362828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3941268961 (or 3941268959 counting only the distinct ones).

The product of its digits is 47775744, while the sum is 64.

The spelling of 21298616362828 in words is "twenty-one trillion, two hundred ninety-eight billion, six hundred sixteen million, three hundred sixty-two thousand, eight hundred twenty-eight".