21655011544030 has 8 divisors (see below), whose sum is σ = 38979020779272. Its totient is φ = 8662004617608.

The previous prime is 21655011544021. The next prime is 21655011544073. The reversal of 21655011544030 is 3044511055612.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1082750577192 + ... + 1082750577211.

It is an arithmetic number, because the mean of its divisors is an integer number (4872377597409).

Almost surely, 2^{21655011544030} is an apocalyptic number.

21655011544030 is a deficient number, since it is larger than the sum of its proper divisors (17324009235242).

21655011544030 is a wasteful number, since it uses less digits than its factorization.

21655011544030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2165501154410.

The product of its (nonzero) digits is 72000, while the sum is 37.

Adding to 21655011544030 its reverse (3044511055612), we get a palindrome (24699522599642).

The spelling of 21655011544030 in words is "twenty-one trillion, six hundred fifty-five billion, eleven million, five hundred forty-four thousand, thirty".