21435445003405 has 16 divisors (see below), whose sum is σ = 26035050000960. Its totient is φ = 16940053369728.

The previous prime is 21435445003393. The next prime is 21435445003451. The reversal of 21435445003405 is 50430054453412.

It is a cyclic number.

It is not a de Polignac number, because 21435445003405 - 2²¹ = 21435442906253 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1573474 + ... + 6733996.

It is an arithmetic number, because the mean of its divisors is an integer number (1627190625060).

Almost surely, 2^{21435445003405} is an apocalyptic number.

It is an amenable number.

21435445003405 is a deficient number, since it is larger than the sum of its proper divisors (4599604997555).

21435445003405 is a wasteful number, since it uses less digits than its factorization.

21435445003405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5170620.

The product of its (nonzero) digits is 576000, while the sum is 40.

Adding to 21435445003405 its reverse (50430054453412), we get a palindrome (71865499456817).

The spelling of 21435445003405 in words is "twenty-one trillion, four hundred thirty-five billion, four hundred forty-five million, three thousand, four hundred five".