21454413165045 has 96 divisors (see below), whose sum is σ = 42694122781440. Its totient is φ = 9763074478080.

The previous prime is 21454413164963. The next prime is 21454413165067. The reversal of 21454413165045 is 54056131445412.

21454413165045 is a `hidden beast` number, since 2 + 1 + 4 + 5 + 4 + 4 + 131 + 6 + 504 + 5 = 666.

It is not a de Polignac number, because 21454413165045 - 2⁷ = 21454413164917 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 61227301 + ... + 61576709.

It is an arithmetic number, because the mean of its divisors is an integer number (444730445640).

Almost surely, 2^{21454413165045} is an apocalyptic number.

It is an amenable number.

21454413165045 is a deficient number, since it is larger than the sum of its proper divisors (21239709616395).

21454413165045 is a wasteful number, since it uses less digits than its factorization.

21454413165045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350315 (or 350312 counting only the distinct ones).

The product of its (nonzero) digits is 1152000, while the sum is 45.

The spelling of 21454413165045 in words is "twenty-one trillion, four hundred fifty-four billion, four hundred thirteen million, one hundred sixty-five thousand, forty-five".