21134031435 has 128 divisors (see below), whose sum is σ = 41793822720. Its totient is φ = 10046678400.

The previous prime is 21134031383. The next prime is 21134031439. The reversal of 21134031435 is 53413043112.

It is a happy number.

21134031435 is a `hidden beast` number, since 2 + 1 + 1 + 340 + 314 + 3 + 5 = 666.

It is not a de Polignac number, because 21134031435 - 2⁷ = 21134031307 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 21134031399 and 21134031408.

It is not an unprimeable number, because it can be changed into a prime (21134031439) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 30942604 + ... + 30943286.

It is an arithmetic number, because the mean of its divisors is an integer number (326514240).

Almost surely, 2^21134031435 is an apocalyptic number.

21134031435 is a deficient number, since it is larger than the sum of its proper divisors (20659791285).

21134031435 is a wasteful number, since it uses less digits than its factorization.

21134031435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086 (or 1080 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 21134031435 its reverse (53413043112), we get a palindrome (74547074547).

The spelling of 21134031435 in words is "twenty-one billion, one hundred thirty-four million, thirty-one thousand, four hundred thirty-five".