21054325516511 has 8 divisors (see below), whose sum is σ = 24062321169024. Its totient is φ = 18046388580120.

The previous prime is 21054325516501. The next prime is 21054325516513. The reversal of 21054325516511 is 11561552345012.

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

It is a cyclic number.

It is not a de Polignac number, because 21054325516511 - 2⁶ = 21054325516447 is a prime.

It is a super-2 number, since 2×21054325516511² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21054325516513) 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, 13907945 + ... + 15347298.

It is an arithmetic number, because the mean of its divisors is an integer number (3007790146128).

Almost surely, 2^{21054325516511} is an apocalyptic number.

21054325516511 is a deficient number, since it is larger than the sum of its proper divisors (3007995652513).

21054325516511 is a wasteful number, since it uses less digits than its factorization.

21054325516511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29358061.

The product of its (nonzero) digits is 180000, while the sum is 41.

The spelling of 21054325516511 in words is "twenty-one trillion, fifty-four billion, three hundred twenty-five million, five hundred sixteen thousand, five hundred eleven".