204421412660 has 24 divisors (see below), whose sum is σ = 454537024200. Its totient is φ = 76958649344.

The previous prime is 204421412659. The next prime is 204421412693. The reversal of 204421412660 is 66214124402.

It can be written as a sum of positive squares in 4 ways, for example, as 54841209124 + 149580203536 = 234182^2 + 386756^2 .

It is a super-2 number, since 2×204421412660² (a number of 23 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, 300619385 + ... + 300620064.

It is an arithmetic number, because the mean of its divisors is an integer number (18939042675).

Almost surely, 2^204421412660 is an apocalyptic number.

204421412660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204421412660 is an abundant number, since it is smaller than the sum of its proper divisors (250115611540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

204421412660 is a wasteful number, since it uses less digits than its factorization.

204421412660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601239475 (or 601239473 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

The spelling of 204421412660 in words is "two hundred four billion, four hundred twenty-one million, four hundred twelve thousand, six hundred sixty".