21052932443551 has 4 divisors (see below), whose sum is σ = 21052970925232. Its totient is φ = 21052893961872.

The previous prime is 21052932443533. The next prime is 21052932443623. The reversal of 21052932443551 is 15534423925012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21052932443551 - 2⁷ = 21052932443423 is a prime.

It is a super-3 number, since 3×21052932443551³ (a number of 41 digits) contains 333 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 (21052932413551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18408195 + ... + 19518388.

It is an arithmetic number, because the mean of its divisors is an integer number (5263242731308).

Almost surely, 2^{21052932443551} is an apocalyptic number.

21052932443551 is a deficient number, since it is larger than the sum of its proper divisors (38481681).

21052932443551 is an equidigital number, since it uses as much as digits as its factorization.

21052932443551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38481680.

The product of its (nonzero) digits is 1296000, while the sum is 46.

The spelling of 21052932443551 in words is "twenty-one trillion, fifty-two billion, nine hundred thirty-two million, four hundred forty-three thousand, five hundred fifty-one".