21201485398 has 16 divisors (see below), whose sum is σ = 32497344000. Its totient is φ = 10369294056.

The previous prime is 21201485381. The next prime is 21201485401. The reversal of 21201485398 is 89358410212.

It is a congruent number.

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, 104353 + ... + 230851.

It is an arithmetic number, because the mean of its divisors is an integer number (2031084000).

Almost surely, 2^21201485398 is an apocalyptic number.

21201485398 is a deficient number, since it is larger than the sum of its proper divisors (11295858602).

21201485398 is a wasteful number, since it uses less digits than its factorization.

21201485398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128331.

The product of its (nonzero) digits is 138240, while the sum is 43.

The spelling of 21201485398 in words is "twenty-one billion, two hundred one million, four hundred eighty-five thousand, three hundred ninety-eight".