21533545125554 has 32 divisors (see below), whose sum is σ = 40322893564800. Its totient is φ = 8378782986240.

The previous prime is 21533545125523. The next prime is 21533545125569. The reversal of 21533545125554 is 45552154533512.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90797189 + ... + 91034040.

It is an arithmetic number, because the mean of its divisors is an integer number (1260090423900).

Almost surely, 2^{21533545125554} is an apocalyptic number.

21533545125554 is a deficient number, since it is larger than the sum of its proper divisors (18789348439246).

21533545125554 is a wasteful number, since it uses less digits than its factorization.

21533545125554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181832018.

The product of its digits is 9000000, while the sum is 50.

The spelling of 21533545125554 in words is "twenty-one trillion, five hundred thirty-three billion, five hundred forty-five million, one hundred twenty-five thousand, five hundred fifty-four".