21152450507 has 8 divisors (see below), whose sum is σ = 21683911200. Its totient is φ = 20621730240.

The previous prime is 21152450489. The next prime is 21152450509. The reversal of 21152450507 is 70505425112.

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

It is a cyclic number.

It is not a de Polignac number, because 21152450507 - 2⁶ = 21152450443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21152450509) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 127028 + ... + 241745.

It is an arithmetic number, because the mean of its divisors is an integer number (2710488900).

Almost surely, 2^21152450507 is an apocalyptic number.

21152450507 is a deficient number, since it is larger than the sum of its proper divisors (531460693).

21152450507 is a wasteful number, since it uses less digits than its factorization.

21152450507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370213.

The product of its (nonzero) digits is 14000, while the sum is 32.

Adding to 21152450507 its reverse (70505425112), we get a palindrome (91657875619).

The spelling of 21152450507 in words is "twenty-one billion, one hundred fifty-two million, four hundred fifty thousand, five hundred seven".