21134454135 has 16 divisors (see below), whose sum is σ = 34905937920. Its totient is φ = 10908105120.

The previous prime is 21134454101. The next prime is 21134454137. The reversal of 21134454135 is 53145443112.

It is not a de Polignac number, because 21134454135 - 2⁹ = 21134453623 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21134454096 and 21134454105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21134454137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22724755 + ... + 22725684.

It is an arithmetic number, because the mean of its divisors is an integer number (2181621120).

Almost surely, 2^21134454135 is an apocalyptic number.

21134454135 is a deficient number, since it is larger than the sum of its proper divisors (13771483785).

21134454135 is a wasteful number, since it uses less digits than its factorization.

21134454135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45450478.

The product of its digits is 28800, while the sum is 33.

Adding to 21134454135 its reverse (53145443112), we get a palindrome (74279897247).

The spelling of 21134454135 in words is "twenty-one billion, one hundred thirty-four million, four hundred fifty-four thousand, one hundred thirty-five".