10181523021 has 4 divisors (see below), whose sum is σ = 13575364032. Its totient is φ = 6787682012.

The previous prime is 10181522977. The next prime is 10181523031. The reversal of 10181523021 is 12032518101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10181523021 - 2⁹ = 10181522509 is a prime.

It is a super-2 number, since 2×10181523021² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10181522982 and 10181523000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10181523031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1696920501 + ... + 1696920506.

It is an arithmetic number, because the mean of its divisors is an integer number (3393841008).

Almost surely, 2^10181523021 is an apocalyptic number.

It is an amenable number.

10181523021 is a deficient number, since it is larger than the sum of its proper divisors (3393841011).

10181523021 is an equidigital number, since it uses as much as digits as its factorization.

10181523021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3393841010.

The product of its (nonzero) digits is 480, while the sum is 24.

The spelling of 10181523021 in words is "ten billion, one hundred eighty-one million, five hundred twenty-three thousand, twenty-one".