21755065553304 has 32 divisors (see below), whose sum is σ = 55413846223920. Its totient is φ = 7114864205696.

The previous prime is 21755065553269. The next prime is 21755065553323. The reversal of 21755065553304 is 40335556055712.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8551518207 + ... + 8551520750.

Almost surely, 2^{21755065553304} is an apocalyptic number.

21755065553304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21755065553304 is an abundant number, since it is smaller than the sum of its proper divisors (33658780670616).

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

21755065553304 is a wasteful number, since it uses less digits than its factorization.

21755065553304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17103039019 (or 17103039015 counting only the distinct ones).

The product of its (nonzero) digits is 9450000, while the sum is 51.

The spelling of 21755065553304 in words is "twenty-one trillion, seven hundred fifty-five billion, sixty-five million, five hundred fifty-three thousand, three hundred four".