21485182863680 has 56 divisors (see below), whose sum is σ = 51162628330368. Its totient is φ = 8593899012608.

The previous prime is 21485182863679. The next prime is 21485182863707. The reversal of 21485182863680 is 8636828158412.

It is a super-2 number, since 2×21485182863680² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15757277 + ... + 17066403.

Almost surely, 2^{21485182863680} is an apocalyptic number.

21485182863680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21485182863680 is an abundant number, since it is smaller than the sum of its proper divisors (29677445466688).

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

21485182863680 is a wasteful number, since it uses less digits than its factorization.

21485182863680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360431 (or 1360421 counting only the distinct ones).

The product of its (nonzero) digits is 35389440, while the sum is 62.

The spelling of 21485182863680 in words is "twenty-one trillion, four hundred eighty-five billion, one hundred eighty-two million, eight hundred sixty-three thousand, six hundred eighty".