1520020343 has 8 divisors (see below), whose sum is σ = 1597688928. Its totient is φ = 1443316864.

The previous prime is 1520020331. The next prime is 1520020393. The reversal of 1520020343 is 3430200251.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1520020343 - 2²⁴ = 1503243127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1520020393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 238046 + ... + 244347.

It is an arithmetic number, because the mean of its divisors is an integer number (199711116).

Almost surely, 2^1520020343 is an apocalyptic number.

1520020343 is a deficient number, since it is larger than the sum of its proper divisors (77668585).

1520020343 is a wasteful number, since it uses less digits than its factorization.

1520020343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482553.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 1520020343 is about 38987.4382718331. The cubic root of 1520020343 is about 1149.7845451439.

Adding to 1520020343 its reverse (3430200251), we get a palindrome (4950220594).

The spelling of 1520020343 in words is "one billion, five hundred twenty million, twenty thousand, three hundred forty-three".