21487484428 has 6 divisors (see below), whose sum is σ = 37603097756. Its totient is φ = 10743742212.

The previous prime is 21487484413. The next prime is 21487484443. The reversal of 21487484428 is 82448478412.

It is an interprime number because it is at equal distance from previous prime (21487484413) and next prime (21487484443).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2685935550 + ... + 2685935557.

Almost surely, 2^21487484428 is an apocalyptic number.

It is an amenable number.

21487484428 is a deficient number, since it is larger than the sum of its proper divisors (16115613328).

21487484428 is a wasteful number, since it uses less digits than its factorization.

21487484428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5371871111 (or 5371871109 counting only the distinct ones).

The product of its digits is 3670016, while the sum is 52.

The spelling of 21487484428 in words is "twenty-one billion, four hundred eighty-seven million, four hundred eighty-four thousand, four hundred twenty-eight".