21549860562 has 16 divisors (see below), whose sum is σ = 43502523552. Its totient is φ = 7116153120.

The previous prime is 21549860539. The next prime is 21549860581. The reversal of 21549860562 is 26506894512.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16782739 + ... + 16784022.

It is an arithmetic number, because the mean of its divisors is an integer number (2718907722).

Almost surely, 2^21549860562 is an apocalyptic number.

21549860562 is an abundant number, since it is smaller than the sum of its proper divisors (21952662990).

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

21549860562 is a wasteful number, since it uses less digits than its factorization.

21549860562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33566873.

The product of its (nonzero) digits is 1036800, while the sum is 48.

The spelling of 21549860562 in words is "twenty-one billion, five hundred forty-nine million, eight hundred sixty thousand, five hundred sixty-two".