20321311254 has 16 divisors (see below), whose sum is σ = 40745001648. Its totient is φ = 6756707232.

The previous prime is 20321311249. The next prime is 20321311277. The reversal of 20321311254 is 45211312302.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4263217 + ... + 4267980.

It is an arithmetic number, because the mean of its divisors is an integer number (2546562603).

Almost surely, 2^20321311254 is an apocalyptic number.

20321311254 is an abundant number, since it is smaller than the sum of its proper divisors (20423690394).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20321311254 is a wasteful number, since it uses less digits than its factorization.

20321311254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8531599.

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 20321311254 its reverse (45211312302), we get a palindrome (65532623556).

The spelling of 20321311254 in words is "twenty billion, three hundred twenty-one million, three hundred eleven thousand, two hundred fifty-four".