1313023020 has 48 divisors (see below), whose sum is σ = 3754695168. Its totient is φ = 342688960.

The previous prime is 1313023013. The next prime is 1313023021. The reversal of 1313023020 is 203203131.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (1313023021) 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, 229986 + ... + 235625.

It is an arithmetic number, because the mean of its divisors is an integer number (78222816).

Almost surely, 2^1313023020 is an apocalyptic number.

1313023020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1313023020 is an abundant number, since it is smaller than the sum of its proper divisors (2441672148).

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

1313023020 is a wasteful number, since it uses less digits than its factorization.

1313023020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465670 (or 465668 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 1313023020 is about 36235.6595082800. The cubic root of 1313023020 is about 1095.0251990615.

Adding to 1313023020 its reverse (203203131), we get a palindrome (1516226151).

It can be divided in two parts, 13130230 and 20, that added together give a triangular number (13130250 = T₅₁₂₄).

The spelling of 1313023020 in words is "one billion, three hundred thirteen million, twenty-three thousand, twenty".