10542544021 has 4 divisors (see below), whose sum is σ = 10613299500. Its totient is φ = 10471788544.

The previous prime is 10542543961. The next prime is 10542544031. The reversal of 10542544021 is 12044524501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12044524501 = 1031 ⋅11682371.

It can be written as a sum of positive squares in 2 ways, for example, as 3595321521 + 6947222500 = 59961^2 + 83350^2 .

It is a cyclic number.

It is not a de Polignac number, because 10542544021 - 2¹¹ = 10542541973 is a prime.

It is a super-2 number, since 2×10542544021² (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 (10542544031) 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, 35377516 + ... + 35377813.

It is an arithmetic number, because the mean of its divisors is an integer number (2653324875).

Almost surely, 2^10542544021 is an apocalyptic number.

It is an amenable number.

10542544021 is a deficient number, since it is larger than the sum of its proper divisors (70755479).

10542544021 is an equidigital number, since it uses as much as digits as its factorization.

10542544021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70755478.

The product of its (nonzero) digits is 6400, while the sum is 28.

The spelling of 10542544021 in words is "ten billion, five hundred forty-two million, five hundred forty-four thousand, twenty-one".