1320020023 has 4 divisors (see below), whose sum is σ = 1508594320. Its totient is φ = 1131445728.

The previous prime is 1320019993. The next prime is 1320020027. The reversal of 1320020023 is 3200200231.

It is a happy number.

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

It is not a de Polignac number, because 1320020023 - 2⁵ = 1320019991 is a prime.

It is a super-2 number, since 2×1320020023² = 3484905722241841058, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1320019985 and 1320020012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320020027) 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, 94287138 + ... + 94287151.

It is an arithmetic number, because the mean of its divisors is an integer number (377148580).

Almost surely, 2^1320020023 is an apocalyptic number.

1320020023 is a deficient number, since it is larger than the sum of its proper divisors (188574297).

1320020023 is an equidigital number, since it uses as much as digits as its factorization.

1320020023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188574296.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 1320020023 is about 36332.0798055933. The cubic root of 1320020023 is about 1096.9668570384.

Adding to 1320020023 its reverse (3200200231), we get a palindrome (4520220254).

The spelling of 1320020023 in words is "one billion, three hundred twenty million, twenty thousand, twenty-three".