21022143435 has 40 divisors (see below), whose sum is σ = 37823391936. Its totient is φ = 11170379520.

The previous prime is 21022143427. The next prime is 21022143473. The reversal of 21022143435 is 53434122012.

21022143435 is a `hidden beast` number, since 2 + 1 + 0 + 221 + 4 + 3 + 435 = 666.

It is not a de Polignac number, because 21022143435 - 2³ = 21022143427 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 = 21022143399 and 21022143408.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 13987 + ... + 205523.

Almost surely, 2^21022143435 is an apocalyptic number.

21022143435 is a deficient number, since it is larger than the sum of its proper divisors (16801248501).

21022143435 is a wasteful number, since it uses less digits than its factorization.

21022143435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191825 (or 191816 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 21022143435 its reverse (53434122012), we get a palindrome (74456265447).

The spelling of 21022143435 in words is "twenty-one billion, twenty-two million, one hundred forty-three thousand, four hundred thirty-five".