21434013145 has 32 divisors (see below), whose sum is σ = 28526284800. Its totient is φ = 15387413184.

The previous prime is 21434013131. The next prime is 21434013203. The reversal of 21434013145 is 54131043412.

It is a cyclic number.

It is not a de Polignac number, because 21434013145 - 2²³ = 21425624537 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 177436 + ... + 272674.

It is an arithmetic number, because the mean of its divisors is an integer number (891446400).

Almost surely, 2^21434013145 is an apocalyptic number.

It is an amenable number.

21434013145 is a deficient number, since it is larger than the sum of its proper divisors (7092271655).

21434013145 is a wasteful number, since it uses less digits than its factorization.

21434013145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95389.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 21434013145 its reverse (54131043412), we get a palindrome (75565056557).

The spelling of 21434013145 in words is "twenty-one billion, four hundred thirty-four million, thirteen thousand, one hundred forty-five".