306444444021 has 28 divisors (see below), whose sum is σ = 459510665760. Its totient is φ = 204272205480.

The previous prime is 306444444013. The next prime is 306444444037. The reversal of 306444444021 is 120444444603.

306444444021 is a `hidden beast` number, since 3 + 0 + 644 + 4 + 4 + 4 + 4 + 0 + 2 + 1 = 666.

It is not a de Polignac number, because 306444444021 - 2³ = 306444444013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306444244021) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 7896856 + ... + 7935566.

Almost surely, 2^306444444021 is an apocalyptic number.

It is an amenable number.

306444444021 is a deficient number, since it is larger than the sum of its proper divisors (153066221739).

306444444021 is an equidigital number, since it uses as much as digits as its factorization.

306444444021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49588 (or 49573 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 36.

Adding to 306444444021 its reverse (120444444603), we get a palindrome (426888888624).

The spelling of 306444444021 in words is "three hundred six billion, four hundred forty-four million, four hundred forty-four thousand, twenty-one".