21434503045 has 16 divisors (see below), whose sum is σ = 27463911552. Its totient is φ = 16020607680.

The previous prime is 21434503019. The next prime is 21434503061. The reversal of 21434503045 is 54030543412.

It is not a de Polignac number, because 21434503045 - 2⁷ = 21434502917 is a prime.

It is a super-2 number, since 2×21434503045² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21434502998 and 21434503016.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2162346 + ... + 2172235.

It is an arithmetic number, because the mean of its divisors is an integer number (1716494472).

Almost surely, 2^21434503045 is an apocalyptic number.

It is an amenable number.

21434503045 is a deficient number, since it is larger than the sum of its proper divisors (6029408507).

21434503045 is a wasteful number, since it uses less digits than its factorization.

21434503045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4334652.

The product of its (nonzero) digits is 28800, while the sum is 31.

The spelling of 21434503045 in words is "twenty-one billion, four hundred thirty-four million, five hundred three thousand, forty-five".