21252350502 has 24 divisors (see below), whose sum is σ = 46382872536. Its totient is φ = 7032407136.

The previous prime is 21252350501. The next prime is 21252350519. The reversal of 21252350502 is 20505325212.

21252350502 is a `hidden beast` number, since 2 + 125 + 2 + 35 + 0 + 502 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21252350501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4306608 + ... + 4311539.

It is an arithmetic number, because the mean of its divisors is an integer number (1932619689).

Almost surely, 2^21252350502 is an apocalyptic number.

21252350502 is an abundant number, since it is smaller than the sum of its proper divisors (25130522034).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21252350502 is a wasteful number, since it uses less digits than its factorization.

21252350502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8618292 (or 8618289 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

Adding to 21252350502 its reverse (20505325212), we get a palindrome (41757675714).

The spelling of 21252350502 in words is "twenty-one billion, two hundred fifty-two million, three hundred fifty thousand, five hundred two".