21488084208 has 30 divisors (see below), whose sum is σ = 60136791624. Its totient is φ = 7162694688.

The previous prime is 21488084171. The next prime is 21488084237. The reversal of 21488084208 is 80248088412.

21488084208 is a `hidden beast` number, since 2 + 148 + 80 + 8 + 420 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 74611260 + ... + 74611547.

Almost surely, 2^21488084208 is an apocalyptic number.

It is an amenable number.

21488084208 is an abundant number, since it is smaller than the sum of its proper divisors (38648707416).

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

21488084208 is a wasteful number, since it uses less digits than its factorization.

21488084208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149222821 (or 149222812 counting only the distinct ones).

The product of its (nonzero) digits is 262144, while the sum is 45.

The spelling of 21488084208 in words is "twenty-one billion, four hundred eighty-eight million, eighty-four thousand, two hundred eight".