21404155340604 has 48 divisors (see below), whose sum is σ = 53032375620000. Its totient is φ = 6695788333056.

The previous prime is 21404155340551. The next prime is 21404155340641. The reversal of 21404155340604 is 40604355140412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150247329 + ... + 150389720.

It is an arithmetic number, because the mean of its divisors is an integer number (1104841158750).

Almost surely, 2^{21404155340604} is an apocalyptic number.

It is an amenable number.

21404155340604 is an abundant number, since it is smaller than the sum of its proper divisors (31628220279396).

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

21404155340604 is a wasteful number, since it uses less digits than its factorization.

21404155340604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300637422 (or 300637420 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 39.

The spelling of 21404155340604 in words is "twenty-one trillion, four hundred four billion, one hundred fifty-five million, three hundred forty thousand, six hundred four".