20315301213 has 16 divisors (see below), whose sum is σ = 27589648896. Its totient is φ = 13293925680.

The previous prime is 20315301143. The next prime is 20315301221. The reversal of 20315301213 is 31210351302.

It is not a de Polignac number, because 20315301213 - 2¹⁰ = 20315300189 is a prime.

It is a super-2 number, since 2×20315301213² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20315301213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20315301233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161731 + ... + 258432.

It is an arithmetic number, because the mean of its divisors is an integer number (1724353056).

Almost surely, 2^20315301213 is an apocalyptic number.

It is an amenable number.

20315301213 is a deficient number, since it is larger than the sum of its proper divisors (7274347683).

20315301213 is a wasteful number, since it uses less digits than its factorization.

20315301213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420464.

The product of its (nonzero) digits is 540, while the sum is 21.

Adding to 20315301213 its reverse (31210351302), we get a palindrome (51525652515).

The spelling of 20315301213 in words is "twenty billion, three hundred fifteen million, three hundred one thousand, two hundred thirteen".