21230250502 has 8 divisors (see below), whose sum is σ = 31893555312. Its totient is φ = 10599065400.

The previous prime is 21230250497. The next prime is 21230250557. The reversal of 21230250502 is 20505203212.

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

It is a super-3 number, since 3×21230250502³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8028274 + ... + 8030917.

It is an arithmetic number, because the mean of its divisors is an integer number (3986694414).

Almost surely, 2^21230250502 is an apocalyptic number.

21230250502 is a deficient number, since it is larger than the sum of its proper divisors (10663304810).

21230250502 is a wasteful number, since it uses less digits than its factorization.

21230250502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16059854.

The product of its (nonzero) digits is 1200, while the sum is 22.

Adding to 21230250502 its reverse (20505203212), we get a palindrome (41735453714).

The spelling of 21230250502 in words is "twenty-one billion, two hundred thirty million, two hundred fifty thousand, five hundred two".