21655420603313 has 8 divisors (see below), whose sum is σ = 25825097862528. Its totient is φ = 17754754780224.

The previous prime is 21655420603241. The next prime is 21655420603331. The reversal of 21655420603313 is 31330602455612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21655420603313 - 2⁸ = 21655420603057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21655420603913) 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, 67252858856 + ... + 67252859177.

It is an arithmetic number, because the mean of its divisors is an integer number (3228137232816).

Almost surely, 2^{21655420603313} is an apocalyptic number.

21655420603313 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21655420603313 is a deficient number, since it is larger than the sum of its proper divisors (4169677259215).

21655420603313 is a wasteful number, since it uses less digits than its factorization.

21655420603313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134505718063.

The product of its (nonzero) digits is 388800, while the sum is 41.

The spelling of 21655420603313 in words is "twenty-one trillion, six hundred fifty-five billion, four hundred twenty million, six hundred three thousand, three hundred thirteen".