620423330521 has 16 divisors (see below), whose sum is σ = 657578750400. Its totient is φ = 584354127168.

The previous prime is 620423330497. The next prime is 620423330537. The reversal of 620423330521 is 125033324026.

It is a cyclic number.

It is not a de Polignac number, because 620423330521 - 2¹⁷ = 620423199449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620423330321) 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 15 ways as a sum of consecutive naturals, for example, 665295 + ... + 1297483.

It is an arithmetic number, because the mean of its divisors is an integer number (41098671900).

Almost surely, 2^620423330521 is an apocalyptic number.

It is an amenable number.

620423330521 is a deficient number, since it is larger than the sum of its proper divisors (37155419879).

620423330521 is a wasteful number, since it uses less digits than its factorization.

620423330521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633048.

The product of its (nonzero) digits is 25920, while the sum is 31.

Adding to 620423330521 its reverse (125033324026), we get a palindrome (745456654547).

The spelling of 620423330521 in words is "six hundred twenty billion, four hundred twenty-three million, three hundred thirty thousand, five hundred twenty-one".