1331030020 has 12 divisors (see below), whose sum is σ = 2795163084. Its totient is φ = 532412000.

The previous prime is 1331029993. The next prime is 1331030021. The reversal of 1331030020 is 200301331.

It can be written as a sum of positive squares in 2 ways, for example, as 319408384 + 1011621636 = 17872^2 + 31806^2 .

It is not an unprimeable number, because it can be changed into a prime (1331030021) 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, 33275731 + ... + 33275770.

It is an arithmetic number, because the mean of its divisors is an integer number (232930257).

Almost surely, 2^1331030020 is an apocalyptic number.

1331030020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1331030020 is an abundant number, since it is smaller than the sum of its proper divisors (1464133064).

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

1331030020 is a wasteful number, since it uses less digits than its factorization.

1331030020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66551510 (or 66551508 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 1331030020 is about 36483.2841175243. The cubic root of 1331030020 is about 1100.0082699103.

Adding to 1331030020 its reverse (200301331), we get a palindrome (1531331351).

The spelling of 1331030020 in words is "one billion, three hundred thirty-one million, thirty thousand, twenty".