21258269241 has 16 divisors (see below), whose sum is σ = 30923555520. Its totient is φ = 12882784320.

The previous prime is 21258269233. The next prime is 21258269261. The reversal of 21258269241 is 14296285212.

It is not a de Polignac number, because 21258269241 - 2³ = 21258269233 is a prime.

It is a super-2 number, since 2×21258269241² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21258269193 and 21258269202.

It is not an unprimeable number, because it can be changed into a prime (21258269261) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 822471 + ... + 847923.

It is an arithmetic number, because the mean of its divisors is an integer number (1932722220).

Almost surely, 2^21258269241 is an apocalyptic number.

It is an amenable number.

21258269241 is a deficient number, since it is larger than the sum of its proper divisors (9665286279).

21258269241 is a wasteful number, since it uses less digits than its factorization.

21258269241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50776.

The product of its digits is 138240, while the sum is 42.

The spelling of 21258269241 in words is "twenty-one billion, two hundred fifty-eight million, two hundred sixty-nine thousand, two hundred forty-one".