21405022035 has 8 divisors (see below), whose sum is σ = 34248035280. Its totient is φ = 11416011744.

The previous prime is 21405022027. The next prime is 21405022039. The reversal of 21405022035 is 53022050412.

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

It is not a de Polignac number, because 21405022035 - 2³ = 21405022027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21405021996 and 21405022014.

It is not an unprimeable number, because it can be changed into a prime (21405022039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 713500720 + ... + 713500749.

It is an arithmetic number, because the mean of its divisors is an integer number (4281004410).

Almost surely, 2^21405022035 is an apocalyptic number.

21405022035 is a deficient number, since it is larger than the sum of its proper divisors (12843013245).

21405022035 is a wasteful number, since it uses less digits than its factorization.

21405022035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1427001477.

The product of its (nonzero) digits is 2400, while the sum is 24.

Adding to 21405022035 its reverse (53022050412), we get a palindrome (74427072447).

The spelling of 21405022035 in words is "twenty-one billion, four hundred five million, twenty-two thousand, thirty-five".