21052932443505 has 12 divisors (see below), whose sum is σ = 36491749568820. Its totient is φ = 11228230636512.

The previous prime is 21052932443471. The next prime is 21052932443533. The reversal of 21052932443505 is 50534423925012.

It is a happy number.

21052932443505 is a `hidden beast` number, since 2 + 1 + 0 + 5 + 293 + 2 + 4 + 4 + 350 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 13404649047696 + 7648283395809 = 3661236^2 + 2765553^2 .

It is not a de Polignac number, because 21052932443505 - 2⁶ = 21052932443441 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 467842943189 = 21052932443505 / (2 + 1 + 0 + 5 + 2 + 9 + 3 + 2 + 4 + 4 + 3 + 5 + 0 + 5).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 233921471550 + ... + 233921471639.

It is an arithmetic number, because the mean of its divisors is an integer number (3040979130735).

Almost surely, 2^{21052932443505} is an apocalyptic number.

It is an amenable number.

21052932443505 is a deficient number, since it is larger than the sum of its proper divisors (15438817125315).

21052932443505 is a wasteful number, since it uses less digits than its factorization.

21052932443505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467842943200 (or 467842943197 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 45.

The spelling of 21052932443505 in words is "twenty-one trillion, fifty-two billion, nine hundred thirty-two million, four hundred forty-three thousand, five hundred five".