20321212502 has 16 divisors (see below), whose sum is σ = 31290527040. Its totient is φ = 9894560832.

The previous prime is 20321212477. The next prime is 20321212523. The reversal of 20321212502 is 20521212302.

It is a super-2 number, since 2×20321212502² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 869393 + ... + 892460.

It is an arithmetic number, because the mean of its divisors is an integer number (1955657940).

Almost surely, 2^20321212502 is an apocalyptic number.

20321212502 is a deficient number, since it is larger than the sum of its proper divisors (10969314538).

20321212502 is a wasteful number, since it uses less digits than its factorization.

20321212502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1762007.

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 20321212502 its reverse (20521212302), we get a palindrome (40842424804).

The spelling of 20321212502 in words is "twenty billion, three hundred twenty-one million, two hundred twelve thousand, five hundred two".