20311323007 has 4 divisors (see below), whose sum is σ = 20783679400. Its totient is φ = 19838966616.

The previous prime is 20311323001. The next prime is 20311323031. The reversal of 20311323007 is 70032311302.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20311323007 - 2¹⁵ = 20311290239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311323001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236178132 + ... + 236178217.

It is an arithmetic number, because the mean of its divisors is an integer number (5195919850).

Almost surely, 2^20311323007 is an apocalyptic number.

20311323007 is a deficient number, since it is larger than the sum of its proper divisors (472356393).

20311323007 is an equidigital number, since it uses as much as digits as its factorization.

20311323007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472356392.

The product of its (nonzero) digits is 756, while the sum is 22.

Adding to 20311323007 its reverse (70032311302), we get a palindrome (90343634309).

The spelling of 20311323007 in words is "twenty billion, three hundred eleven million, three hundred twenty-three thousand, seven".