104505378021 has 24 divisors (see below), whose sum is σ = 164703580704. Its totient is φ = 63325654560.

The previous prime is 104505378017. The next prime is 104505378031. The reversal of 104505378021 is 120873505401.

104505378021 is a `hidden beast` number, since 1 + 0 + 45 + 0 + 537 + 80 + 2 + 1 = 666.

It is not a de Polignac number, because 104505378021 - 2² = 104505378017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104505378031) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 504555 + ... + 680871.

It is an arithmetic number, because the mean of its divisors is an integer number (6862649196).

Almost surely, 2^104505378021 is an apocalyptic number.

104505378021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

104505378021 is a deficient number, since it is larger than the sum of its proper divisors (60198202683).

104505378021 is a wasteful number, since it uses less digits than its factorization.

104505378021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182321 (or 182318 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The spelling of 104505378021 in words is "one hundred four billion, five hundred five million, three hundred seventy-eight thousand, twenty-one".