21408167485282 has 4 divisors (see below), whose sum is σ = 32112251227926. Its totient is φ = 10704083742640.

The previous prime is 21408167485273. The next prime is 21408167485301. The reversal of 21408167485282 is 28258476180412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 21397276266961 + 10891218321 = 4625719^2 + 104361^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5352041871319 + ... + 5352041871322.

Almost surely, 2^{21408167485282} is an apocalyptic number.

21408167485282 is a deficient number, since it is larger than the sum of its proper divisors (10704083742644).

21408167485282 is a wasteful number, since it uses less digits than its factorization.

21408167485282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10704083742643.

The product of its (nonzero) digits is 13762560, while the sum is 58.

The spelling of 21408167485282 in words is "twenty-one trillion, four hundred eight billion, one hundred sixty-seven million, four hundred eighty-five thousand, two hundred eighty-two".