21357285484 has 12 divisors (see below), whose sum is σ = 38385391744. Its totient is φ = 10390030704.

The previous prime is 21357285473. The next prime is 21357285541. The reversal of 21357285484 is 48458275312.

It is a super-2 number, since 2×21357285484² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72152844 + ... + 72153139.

Almost surely, 2^21357285484 is an apocalyptic number.

It is an amenable number.

21357285484 is a deficient number, since it is larger than the sum of its proper divisors (17028106260).

21357285484 is a wasteful number, since it uses less digits than its factorization.

21357285484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144306024 (or 144306022 counting only the distinct ones).

The product of its digits is 2150400, while the sum is 49.

The spelling of 21357285484 in words is "twenty-one billion, three hundred fifty-seven million, two hundred eighty-five thousand, four hundred eighty-four".