20313132123 has 16 divisors (see below), whose sum is σ = 28540755200. Its totient is φ = 12815353440.

The previous prime is 20313132061. The next prime is 20313132149. The reversal of 20313132123 is 32123131302.

It is not a de Polignac number, because 20313132123 - 2²² = 20308937819 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20313132123.

It is not an unprimeable number, because it can be changed into a prime (20313132173) 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, 141508 + ... + 246273.

It is an arithmetic number, because the mean of its divisors is an integer number (1783797200).

Almost surely, 2^20313132123 is an apocalyptic number.

20313132123 is a deficient number, since it is larger than the sum of its proper divisors (8227623077).

20313132123 is a wasteful number, since it uses less digits than its factorization.

20313132123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388722.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 20313132123 its reverse (32123131302), we get a palindrome (52436263425).

The spelling of 20313132123 in words is "twenty billion, three hundred thirteen million, one hundred thirty-two thousand, one hundred twenty-three".