205421630314004 has 24 divisors (see below), whose sum is σ = 387141220667880. Its totient is φ = 94809871586304.

The previous prime is 205421630313967. The next prime is 205421630314037. The reversal of 205421630314004 is 400413036124502.

205421630314004 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 9152682115600 + 196268948198404 = 3025340^2 + 14009602^2 .

It is a super-2 number, since 2×205421630314004² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56368892 + ... + 59902380.

It is an arithmetic number, because the mean of its divisors is an integer number (16130884194495).

Almost surely, 2^{205421630314004} is an apocalyptic number.

It is an amenable number.

205421630314004 is a deficient number, since it is larger than the sum of its proper divisors (181719590353876).

205421630314004 is a wasteful number, since it uses less digits than its factorization.

205421630314004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4651499 (or 4651497 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 35.

Adding to 205421630314004 its reverse (400413036124502), we get a palindrome (605834666438506).

The spelling of 205421630314004 in words is "two hundred five trillion, four hundred twenty-one billion, six hundred thirty million, three hundred fourteen thousand, four".