10511825821 has 16 divisors (see below), whose sum is σ = 12150103680. Its totient is φ = 8908056000.

The previous prime is 10511825809. The next prime is 10511825839. The reversal of 10511825821 is 12852811501.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 10511825821 - 2⁵ = 10511825789 is a prime.

It is a super-2 number, since 2×10511825821² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10511825321) 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, 341571 + ... + 371071.

It is an arithmetic number, because the mean of its divisors is an integer number (759381480).

Almost surely, 2^10511825821 is an apocalyptic number.

It is an amenable number.

10511825821 is a deficient number, since it is larger than the sum of its proper divisors (1638277859).

10511825821 is a wasteful number, since it uses less digits than its factorization.

10511825821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30084.

The product of its (nonzero) digits is 6400, while the sum is 34.

The spelling of 10511825821 in words is "ten billion, five hundred eleven million, eight hundred twenty-five thousand, eight hundred twenty-one".