21151232435 has 8 divisors (see below), whose sum is σ = 25811673840. Its totient is φ = 16634189344.

The previous prime is 21151232429. The next prime is 21151232449. The reversal of 21151232435 is 53423215112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21151232435 - 2⁴ = 21151232419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21151232398 and 21151232407.

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 7 ways as a sum of consecutive naturals, for example, 35849252 + ... + 35849841.

It is an arithmetic number, because the mean of its divisors is an integer number (3226459230).

Almost surely, 2^21151232435 is an apocalyptic number.

21151232435 is a deficient number, since it is larger than the sum of its proper divisors (4660441405).

21151232435 is an equidigital number, since it uses as much as digits as its factorization.

21151232435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71699157.

The product of its digits is 7200, while the sum is 29.

Adding to 21151232435 its reverse (53423215112), we get a palindrome (74574447547).

The spelling of 21151232435 in words is "twenty-one billion, one hundred fifty-one million, two hundred thirty-two thousand, four hundred thirty-five".