21654104094 has 48 divisors (see below), whose sum is σ = 53844111360. Its totient is φ = 6160991760.

The previous prime is 21654104071. The next prime is 21654104111. The reversal of 21654104094 is 49040145612.

21654104094 is a `hidden beast` number, since 21 + 6 + 541 + 0 + 4 + 0 + 94 = 666.

It is a super-2 number, since 2×21654104094² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 329422 + ... + 389649.

It is an arithmetic number, because the mean of its divisors is an integer number (1121752320).

Almost surely, 2^21654104094 is an apocalyptic number.

21654104094 is an abundant number, since it is smaller than the sum of its proper divisors (32190007266).

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

21654104094 is a wasteful number, since it uses less digits than its factorization.

21654104094 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719325 (or 719322 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 21654104094 in words is "twenty-one billion, six hundred fifty-four million, one hundred four thousand, ninety-four".