21234177435 has 16 divisors (see below), whose sum is σ = 35146225440. Its totient is φ = 10934380800.

The previous prime is 21234177383. The next prime is 21234177443. The reversal of 21234177435 is 53477143212.

It is not a de Polignac number, because 21234177435 - 2¹⁴ = 21234161051 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21234177393 and 21234177402.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24406666 + ... + 24407535.

It is an arithmetic number, because the mean of its divisors is an integer number (2196639090).

Almost surely, 2^21234177435 is an apocalyptic number.

21234177435 is a deficient number, since it is larger than the sum of its proper divisors (13912048005).

21234177435 is a wasteful number, since it uses less digits than its factorization.

21234177435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48814238.

The product of its digits is 141120, while the sum is 39.

The spelling of 21234177435 in words is "twenty-one billion, two hundred thirty-four million, one hundred seventy-seven thousand, four hundred thirty-five".