21498405412 has 36 divisors (see below), whose sum is σ = 41561329600. Its totient is φ = 9722853360.

The previous prime is 21498405403. The next prime is 21498405433. The reversal of 21498405412 is 21450489412.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15288 + ... + 207919.

Almost surely, 2^21498405412 is an apocalyptic number.

21498405412 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21498405412 is a deficient number, since it is larger than the sum of its proper divisors (20062924188).

21498405412 is a wasteful number, since it uses less digits than its factorization.

21498405412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223432 (or 223419 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 40.

The spelling of 21498405412 in words is "twenty-one billion, four hundred ninety-eight million, four hundred five thousand, four hundred twelve".