20321212315 has 16 divisors (see below), whose sum is σ = 24688996416. Its totient is φ = 16055856000.

The previous prime is 20321212297. The next prime is 20321212337. The reversal of 20321212315 is 51321212302.

It is not a de Polignac number, because 20321212315 - 2¹¹ = 20321210267 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52825 + ... + 208405.

It is an arithmetic number, because the mean of its divisors is an integer number (1543062276).

Almost surely, 2^20321212315 is an apocalyptic number.

20321212315 is a deficient number, since it is larger than the sum of its proper divisors (4367784101).

20321212315 is a wasteful number, since it uses less digits than its factorization.

20321212315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155910.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 20321212315 its reverse (51321212302), we get a palindrome (71642424617).

The spelling of 20321212315 in words is "twenty billion, three hundred twenty-one million, two hundred twelve thousand, three hundred fifteen".