20505537327 has 16 divisors (see below), whose sum is σ = 29828666880. Its totient is φ = 12426585600.

The previous prime is 20505537281. The next prime is 20505537329. The reversal of 20505537327 is 72373550502.

It is not a de Polignac number, because 20505537327 - 2⁶ = 20505537263 is a prime.

It is a super-2 number, since 2×20505537327² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20505537329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 674127 + ... + 703887.

It is an arithmetic number, because the mean of its divisors is an integer number (1864291680).

Almost surely, 2^20505537327 is an apocalyptic number.

20505537327 is a deficient number, since it is larger than the sum of its proper divisors (9323129553).

20505537327 is a wasteful number, since it uses less digits than its factorization.

20505537327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50654.

The product of its (nonzero) digits is 220500, while the sum is 39.

The spelling of 20505537327 in words is "twenty billion, five hundred five million, five hundred thirty-seven thousand, three hundred twenty-seven".