21655054106144 has 48 divisors (see below), whose sum is σ = 42700952548800. Its totient is φ = 10810373992704.

The previous prime is 21655054106123. The next prime is 21655054106149. The reversal of 21655054106144 is 44160145055612.

It is a super-2 number, since 2×21655054106144² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21655054106095 and 21655054106104.

It is not an unprimeable number, because it can be changed into a prime (21655054106149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114108167 + ... + 114297785.

It is an arithmetic number, because the mean of its divisors is an integer number (889603178100).

Almost surely, 2^{21655054106144} is an apocalyptic number.

It is an amenable number.

21655054106144 is a deficient number, since it is larger than the sum of its proper divisors (21045898442656).

21655054106144 is a wasteful number, since it uses less digits than its factorization.

21655054106144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195265 (or 195257 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 44.

The spelling of 21655054106144 in words is "twenty-one trillion, six hundred fifty-five billion, fifty-four million, one hundred six thousand, one hundred forty-four".