21834375251 has 16 divisors (see below), whose sum is σ = 23808556800. Its totient is φ = 19902862848.

The previous prime is 21834375229. The next prime is 21834375253. The reversal of 21834375251 is 15257343812.

It is a cyclic number.

It is not a de Polignac number, because 21834375251 - 2¹⁰ = 21834374227 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21834375199 and 21834375208.

It is not an unprimeable number, because it can be changed into a prime (21834375253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 924350 + ... + 947676.

It is an arithmetic number, because the mean of its divisors is an integer number (1488034800).

Almost surely, 2^21834375251 is an apocalyptic number.

21834375251 is a deficient number, since it is larger than the sum of its proper divisors (1974181549).

21834375251 is a wasteful number, since it uses less digits than its factorization.

21834375251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24238.

The product of its digits is 201600, while the sum is 41.

The spelling of 21834375251 in words is "twenty-one billion, eight hundred thirty-four million, three hundred seventy-five thousand, two hundred fifty-one".