21544714248 has 16 divisors (see below), whose sum is σ = 53861785680. Its totient is φ = 7181571408.

The previous prime is 21544714237. The next prime is 21544714259. The reversal of 21544714248 is 84241744512.

It is an interprime number because it is at equal distance from previous prime (21544714237) and next prime (21544714259).

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, 448848190 + ... + 448848237.

It is an arithmetic number, because the mean of its divisors is an integer number (3366361605).

Almost surely, 2^21544714248 is an apocalyptic number.

It is an amenable number.

21544714248 is an abundant number, since it is smaller than the sum of its proper divisors (32317071432).

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

21544714248 is a wasteful number, since it uses less digits than its factorization.

21544714248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897696436 (or 897696432 counting only the distinct ones).

The product of its digits is 286720, while the sum is 42.

The spelling of 21544714248 in words is "twenty-one billion, five hundred forty-four million, seven hundred fourteen thousand, two hundred forty-eight".