20015321323 has 2 divisors, whose sum is σ = 20015321324. Its totient is φ = 20015321322.

The previous prime is 20015321269. The next prime is 20015321357. The reversal of 20015321323 is 32312351002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20015321323 - 2²¹ = 20013224171 is a prime.

It is a super-2 number, since 2×20015321323² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20015321294 and 20015321303.

It is not a weakly prime, because it can be changed into another prime (20015321393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10007660661 + 10007660662.

It is an arithmetic number, because the mean of its divisors is an integer number (10007660662).

Almost surely, 2^20015321323 is an apocalyptic number.

20015321323 is a deficient number, since it is larger than the sum of its proper divisors (1).

20015321323 is an equidigital number, since it uses as much as digits as its factorization.

20015321323 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 22.

Adding to 20015321323 its reverse (32312351002), we get a palindrome (52327672325).

The spelling of 20015321323 in words is "twenty billion, fifteen million, three hundred twenty-one thousand, three hundred twenty-three".