21507002524412 has 12 divisors (see below), whose sum is σ = 37688601291096. Its totient is φ = 10738830726960.

The previous prime is 21507002524393. The next prime is 21507002524429. The reversal of 21507002524412 is 21442520070512.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3667630514 + ... + 3667636377.

It is an arithmetic number, because the mean of its divisors is an integer number (3140716774258).

Almost surely, 2^{21507002524412} is an apocalyptic number.

It is an amenable number.

21507002524412 is a deficient number, since it is larger than the sum of its proper divisors (16181598766684).

21507002524412 is a wasteful number, since it uses less digits than its factorization.

21507002524412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7335267628 (or 7335267626 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 35.

Adding to 21507002524412 its reverse (21442520070512), we get a palindrome (42949522594924).

The spelling of 21507002524412 in words is "twenty-one trillion, five hundred seven billion, two million, five hundred twenty-four thousand, four hundred twelve".