21354617106404 has 12 divisors (see below), whose sum is σ = 37566237424128. Its totient is φ = 10621406413800.

The previous prime is 21354617106401. The next prime is 21354617106461. The reversal of 21354617106404 is 40460171645312.

It is a super-2 number, since 2×21354617106404² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21354617106401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13975533992 + ... + 13975535519.

It is an arithmetic number, because the mean of its divisors is an integer number (3130519785344).

Almost surely, 2^{21354617106404} is an apocalyptic number.

It is an amenable number.

21354617106404 is a deficient number, since it is larger than the sum of its proper divisors (16211620317724).

21354617106404 is a wasteful number, since it uses less digits than its factorization.

21354617106404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27951069706 (or 27951069704 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 44.

The spelling of 21354617106404 in words is "twenty-one trillion, three hundred fifty-four billion, six hundred seventeen million, one hundred six thousand, four hundred four".