20605552443 has 32 divisors (see below), whose sum is σ = 34909145600. Its totient is φ = 11767366368.

The previous prime is 20605552441. The next prime is 20605552463. The reversal of 20605552443 is 34425550602.

20605552443 is a `hidden beast` number, since 2 + 0 + 60 + 5 + 552 + 4 + 43 = 666.

It is not a de Polignac number, because 20605552443 - 2¹ = 20605552441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20605552398 and 20605552407.

It is not an unprimeable number, because it can be changed into a prime (20605552441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 282780 + ... + 348102.

It is an arithmetic number, because the mean of its divisors is an integer number (1090910800).

Almost surely, 2^20605552443 is an apocalyptic number.

20605552443 is a deficient number, since it is larger than the sum of its proper divisors (14303593157).

20605552443 is a wasteful number, since it uses less digits than its factorization.

20605552443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67008 (or 67002 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 36.

The spelling of 20605552443 in words is "twenty billion, six hundred five million, five hundred fifty-two thousand, four hundred forty-three".