21653633214454 has 48 divisors (see below), whose sum is σ = 34890598447056. Its totient is φ = 10076162969600.

The previous prime is 21653633214449. The next prime is 21653633214509. The reversal of 21653633214454 is 45441233635612.

It is a super-2 number, since 2×21653633214454² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21653633214398 and 21653633214407.

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, 20767902 + ... + 21785614.

It is an arithmetic number, because the mean of its divisors is an integer number (726887467647).

Almost surely, 2^{21653633214454} is an apocalyptic number.

21653633214454 is a deficient number, since it is larger than the sum of its proper divisors (13236965232602).

21653633214454 is a wasteful number, since it uses less digits than its factorization.

21653633214454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018161 (or 1018144 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 49.

The spelling of 21653633214454 in words is "twenty-one trillion, six hundred fifty-three billion, six hundred thirty-three million, two hundred fourteen thousand, four hundred fifty-four".