21104016213654 has 48 divisors (see below), whose sum is σ = 49882526248464. Its totient is φ = 6395117184000.

The previous prime is 21104016213601. The next prime is 21104016213673. The reversal of 21104016213654 is 45631261040112.

21104016213654 is a `hidden beast` number, since 2 + 1 + 10 + 401 + 62 + 136 + 54 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60785754 + ... + 61131954.

It is an arithmetic number, because the mean of its divisors is an integer number (1039219296843).

Almost surely, 2^{21104016213654} is an apocalyptic number.

21104016213654 is an abundant number, since it is smaller than the sum of its proper divisors (28778510034810).

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

21104016213654 is a wasteful number, since it uses less digits than its factorization.

21104016213654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654093 (or 654090 counting only the distinct ones).

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

Adding to 21104016213654 its reverse (45631261040112), we get a palindrome (66735277253766).

The spelling of 21104016213654 in words is "twenty-one trillion, one hundred four billion, sixteen million, two hundred thirteen thousand, six hundred fifty-four".