20355081634 has 16 divisors (see below), whose sum is σ = 32147942400. Its totient is φ = 9639378864.

The previous prime is 20355081599. The next prime is 20355081667. The reversal of 20355081634 is 43618055302.

It is a junction number, because it is equal to n+sod(n) for n = 20355081593 and 20355081602.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83232 + ... + 218260.

It is an arithmetic number, because the mean of its divisors is an integer number (2009246400).

Almost surely, 2^20355081634 is an apocalyptic number.

20355081634 is a deficient number, since it is larger than the sum of its proper divisors (11792860766).

20355081634 is a wasteful number, since it uses less digits than its factorization.

20355081634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139017.

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 20355081634 in words is "twenty billion, three hundred fifty-five million, eighty-one thousand, six hundred thirty-four".