305405413245021 has 64 divisors (see below), whose sum is σ = 440708707328000. Its totient is φ = 187539355261440.

The previous prime is 305405413245007. The next prime is 305405413245029. The reversal of 305405413245021 is 120542314504503.

It is not a de Polignac number, because 305405413245021 - 2¹³ = 305405413236829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305405413245029) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 206685495 + ... + 208157883.

It is an arithmetic number, because the mean of its divisors is an integer number (6886073552000).

Almost surely, 2^{305405413245021} is an apocalyptic number.

It is an amenable number.

305405413245021 is a deficient number, since it is larger than the sum of its proper divisors (135303294082979).

305405413245021 is a wasteful number, since it uses less digits than its factorization.

305405413245021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1473194.

The product of its (nonzero) digits is 288000, while the sum is 39.

Adding to 305405413245021 its reverse (120542314504503), we get a palindrome (425947727749524).

The spelling of 305405413245021 in words is "three hundred five trillion, four hundred five billion, four hundred thirteen million, two hundred forty-five thousand, twenty-one".