21199356048 has 80 divisors (see below), whose sum is σ = 62447003136. Its totient is φ = 6139176960.

The previous prime is 21199356019. The next prime is 21199356097. The reversal of 21199356048 is 84065399112.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 21199355988 and 21199356006.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 988608 + ... + 1009823.

Almost surely, 2^21199356048 is an apocalyptic number.

It is an amenable number.

21199356048 is an abundant number, since it is smaller than the sum of its proper divisors (41247647088).

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

21199356048 is a wasteful number, since it uses less digits than its factorization.

21199356048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1998472 (or 1998466 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 48.

The spelling of 21199356048 in words is "twenty-one billion, one hundred ninety-nine million, three hundred fifty-six thousand, forty-eight".