21153424610 has 8 divisors (see below), whose sum is σ = 38076164316. Its totient is φ = 8461369840.

The previous prime is 21153424609. The next prime is 21153424627. The reversal of 21153424610 is 1642435112.

21153424610 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 21114124249 + 39300361 = 145307^2 + 6269^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1057671221 + ... + 1057671240.

Almost surely, 2^21153424610 is an apocalyptic number.

21153424610 is a deficient number, since it is larger than the sum of its proper divisors (16922739706).

21153424610 is a wasteful number, since it uses less digits than its factorization.

21153424610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2115342468.

The product of its (nonzero) digits is 5760, while the sum is 29.

Adding to 21153424610 its reverse (1642435112), we get a palindrome (22795859722).

The spelling of 21153424610 in words is "twenty-one billion, one hundred fifty-three million, four hundred twenty-four thousand, six hundred ten".