21448215198 has 96 divisors (see below), whose sum is σ = 47900548800. Its totient is φ = 6933696000.

The previous prime is 21448215193. The next prime is 21448215203. The reversal of 21448215198 is 89151284412.

21448215198 is a `hidden beast` number, since 2 + 1 + 448 + 2 + 15 + 198 = 666.

It is an interprime number because it is at equal distance from previous prime (21448215193) and next prime (21448215203).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21448215193) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 30596248 + ... + 30596948.

It is an arithmetic number, because the mean of its divisors is an integer number (498964050).

Almost surely, 2^21448215198 is an apocalyptic number.

21448215198 is an abundant number, since it is smaller than the sum of its proper divisors (26452333602).

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

21448215198 is a wasteful number, since it uses less digits than its factorization.

21448215198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138 (or 1135 counting only the distinct ones).

The product of its digits is 184320, while the sum is 45.

The spelling of 21448215198 in words is "twenty-one billion, four hundred forty-eight million, two hundred fifteen thousand, one hundred ninety-eight".