21252605041510 has 16 divisors (see below), whose sum is σ = 38254884510096. Its totient is φ = 8500998586528.

The previous prime is 21252605041471. The next prime is 21252605041523. The reversal of 21252605041510 is 1514050625212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3335029 + ... + 7323088.

It is an arithmetic number, because the mean of its divisors is an integer number (2390930281881).

Almost surely, 2^{21252605041510} is an apocalyptic number.

21252605041510 is a deficient number, since it is larger than the sum of its proper divisors (17002279468586).

21252605041510 is a wasteful number, since it uses less digits than its factorization.

21252605041510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10857527.

The product of its (nonzero) digits is 24000, while the sum is 34.

Adding to 21252605041510 its reverse (1514050625212), we get a palindrome (22766655666722).

The spelling of 21252605041510 in words is "twenty-one trillion, two hundred fifty-two billion, six hundred five million, forty-one thousand, five hundred ten".