21477434333445 has 48 divisors (see below), whose sum is σ = 37950218308080. Its totient is φ = 11232503912448.

The previous prime is 21477434333441. The next prime is 21477434333447. The reversal of 21477434333445 is 54433343477412.

21477434333445 is a `hidden beast` number, since 2 + 147 + 7 + 434 + 33 + 34 + 4 + 5 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 76842756 + 21477357490689 = 8766^2 + 4634367^2 .

It is not a de Polignac number, because 21477434333445 - 2² = 21477434333441 is a prime.

It is a super-2 number, since 2×21477434333445² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21477434333391 and 21477434333400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21477434333441) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2063151 + ... + 6871059.

It is an arithmetic number, because the mean of its divisors is an integer number (790629548085).

Almost surely, 2^{21477434333445} is an apocalyptic number.

It is an amenable number.

21477434333445 is a deficient number, since it is larger than the sum of its proper divisors (16472783974635).

21477434333445 is a wasteful number, since it uses less digits than its factorization.

21477434333445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4809846 (or 4809843 counting only the distinct ones).

The product of its digits is 40642560, while the sum is 54.

The spelling of 21477434333445 in words is "twenty-one trillion, four hundred seventy-seven billion, four hundred thirty-four million, three hundred thirty-three thousand, four hundred forty-five".