21260725835 has 16 divisors (see below), whose sum is σ = 25583844000. Its totient is φ = 16961322240.

The previous prime is 21260725831. The next prime is 21260725841. The reversal of 21260725835 is 53852706212.

It is not a de Polignac number, because 21260725835 - 2² = 21260725831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21260725792 and 21260725801.

It is not an unprimeable number, because it can be changed into a prime (21260725831) 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, 4371305 + ... + 4376165.

It is an arithmetic number, because the mean of its divisors is an integer number (1598990250).

Almost surely, 2^21260725835 is an apocalyptic number.

21260725835 is a deficient number, since it is larger than the sum of its proper divisors (4323118165).

21260725835 is a wasteful number, since it uses less digits than its factorization.

21260725835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7118.

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

The spelling of 21260725835 in words is "twenty-one billion, two hundred sixty million, seven hundred twenty-five thousand, eight hundred thirty-five".