20835249959 has 32 divisors (see below), whose sum is σ = 22388469120. Its totient is φ = 19347406848.

The previous prime is 20835249949. The next prime is 20835249973. The reversal of 20835249959 is 95994253802.

It is a cyclic number.

It is not a de Polignac number, because 20835249959 - 2¹⁶ = 20835184423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20835249949) 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 31 ways as a sum of consecutive naturals, for example, 36617027 + ... + 36617595.

It is an arithmetic number, because the mean of its divisors is an integer number (699639660).

Almost surely, 2^20835249959 is an apocalyptic number.

20835249959 is a deficient number, since it is larger than the sum of its proper divisors (1553219161).

20835249959 is a wasteful number, since it uses less digits than its factorization.

20835249959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971.

The product of its (nonzero) digits is 6998400, while the sum is 56.

The spelling of 20835249959 in words is "twenty billion, eight hundred thirty-five million, two hundred forty-nine thousand, nine hundred fifty-nine".