21366484404 has 24 divisors (see below), whose sum is σ = 49857520608. Its totient is φ = 7121820000.

The previous prime is 21366484393. The next prime is 21366484427. The reversal of 21366484404 is 40448466312.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 410454 + ... + 459570.

It is an arithmetic number, because the mean of its divisors is an integer number (2077396692).

Almost surely, 2^21366484404 is an apocalyptic number.

It is an amenable number.

21366484404 is an abundant number, since it is smaller than the sum of its proper divisors (28491036204).

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

21366484404 is a wasteful number, since it uses less digits than its factorization.

21366484404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85375 (or 85373 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 42.

The spelling of 21366484404 in words is "twenty-one billion, three hundred sixty-six million, four hundred eighty-four thousand, four hundred four".