21152450630 has 16 divisors (see below), whose sum is σ = 39003056064. Its totient is φ = 8254614720.

The previous prime is 21152450629. The next prime is 21152450633. The reversal of 21152450630 is 3605425112.

It is a junction number, because it is equal to n+sod(n) for n = 21152450593 and 21152450602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21152450633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25795262 + ... + 25796081.

It is an arithmetic number, because the mean of its divisors is an integer number (2437691004).

Almost surely, 2^21152450630 is an apocalyptic number.

21152450630 is a deficient number, since it is larger than the sum of its proper divisors (17850605434).

21152450630 is a wasteful number, since it uses less digits than its factorization.

21152450630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51591391.

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 21152450630 its reverse (3605425112), we get a palindrome (24757875742).

The spelling of 21152450630 in words is "twenty-one billion, one hundred fifty-two million, four hundred fifty thousand, six hundred thirty".