20849417739 has 12 divisors (see below), whose sum is σ = 31231226936. Its totient is φ = 13899611664.

The previous prime is 20849417711. The next prime is 20849417761. The reversal of 20849417739 is 93771494802.

It is not a de Polignac number, because 20849417739 - 2¹⁶ = 20849352203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20849417339) 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 11 ways as a sum of consecutive naturals, for example, 42899794 + ... + 42900279.

Almost surely, 2^20849417739 is an apocalyptic number.

20849417739 is a deficient number, since it is larger than the sum of its proper divisors (10381809197).

20849417739 is an frugal number, since it uses more digits than its factorization.

20849417739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85800088 (or 85800076 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 54.

The spelling of 20849417739 in words is "twenty billion, eight hundred forty-nine million, four hundred seventeen thousand, seven hundred thirty-nine".