21574854408 has 16 divisors (see below), whose sum is σ = 53937136080. Its totient is φ = 7191618128.

The previous prime is 21574854391. The next prime is 21574854437. The reversal of 21574854408 is 80445847512.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 449476110 + ... + 449476157.

It is an arithmetic number, because the mean of its divisors is an integer number (3371071005).

Almost surely, 2^21574854408 is an apocalyptic number.

It is an amenable number.

21574854408 is an abundant number, since it is smaller than the sum of its proper divisors (32362281672).

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

21574854408 is a wasteful number, since it uses less digits than its factorization.

21574854408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 898952276 (or 898952272 counting only the distinct ones).

The product of its (nonzero) digits is 1433600, while the sum is 48.

The spelling of 21574854408 in words is "twenty-one billion, five hundred seventy-four million, eight hundred fifty-four thousand, four hundred eight".