20835091642 has 16 divisors (see below), whose sum is σ = 33094058112. Its totient is φ = 9803851200.

The previous prime is 20835091637. The next prime is 20835091663. The reversal of 20835091642 is 24619053802.

It is a junction number, because it is equal to n+sod(n) for n = 20835091595 and 20835091604.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 484303 + ... + 525565.

It is an arithmetic number, because the mean of its divisors is an integer number (2068378632).

Almost surely, 2^20835091642 is an apocalyptic number.

20835091642 is a deficient number, since it is larger than the sum of its proper divisors (12258966470).

20835091642 is a wasteful number, since it uses less digits than its factorization.

20835091642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56133.

The product of its (nonzero) digits is 103680, while the sum is 40.

It can be divided in two parts, 208350 and 91642, that added together give a palindrome (299992).

The spelling of 20835091642 in words is "twenty billion, eight hundred thirty-five million, ninety-one thousand, six hundred forty-two".