21441246555 has 32 divisors (see below), whose sum is σ = 34526606400. Its totient is φ = 11361953792.

The previous prime is 21441246529. The next prime is 21441246571. The reversal of 21441246555 is 55564214412.

It is a cyclic number.

It is not a de Polignac number, because 21441246555 - 2⁵ = 21441246523 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2386111 + ... + 2395079.

It is an arithmetic number, because the mean of its divisors is an integer number (1078956450).

Almost surely, 2^21441246555 is an apocalyptic number.

21441246555 is a deficient number, since it is larger than the sum of its proper divisors (13085359845).

21441246555 is a wasteful number, since it uses less digits than its factorization.

21441246555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9983.

The product of its digits is 192000, while the sum is 39.

The spelling of 21441246555 in words is "twenty-one billion, four hundred forty-one million, two hundred forty-six thousand, five hundred fifty-five".