21010524019 has 4 divisors (see below), whose sum is σ = 21175961344. Its totient is φ = 20845086696.

The previous prime is 21010523999. The next prime is 21010524089. The reversal of 21010524019 is 91042501012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21010524019 - 2⁹ = 21010523507 is a prime.

It is a super-2 number, since 2×21010524019² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21010523984 and 21010524002.

It is not an unprimeable number, because it can be changed into a prime (21010524089) 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, 82718472 + ... + 82718725.

It is an arithmetic number, because the mean of its divisors is an integer number (5293990336).

Almost surely, 2^21010524019 is an apocalyptic number.

21010524019 is a deficient number, since it is larger than the sum of its proper divisors (165437325).

21010524019 is a wasteful number, since it uses less digits than its factorization.

21010524019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165437324.

The product of its (nonzero) digits is 720, while the sum is 25.

The spelling of 21010524019 in words is "twenty-one billion, ten million, five hundred twenty-four thousand, nineteen".