20980761989 has 32 divisors (see below), whose sum is σ = 25183733760. Its totient is φ = 17254036800.

The previous prime is 20980761983. The next prime is 20980762003. The reversal of 20980761989 is 98916708902.

It is not a de Polignac number, because 20980761989 - 2²⁴ = 20963984773 is a prime.

It is a super-2 number, since 2×20980761989² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20980761983) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3029759 + ... + 3036675.

It is an arithmetic number, because the mean of its divisors is an integer number (786991680).

Almost surely, 2^20980761989 is an apocalyptic number.

It is an amenable number.

20980761989 is a deficient number, since it is larger than the sum of its proper divisors (4202971771).

20980761989 is a wasteful number, since it uses less digits than its factorization.

20980761989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7601.

The product of its (nonzero) digits is 3919104, while the sum is 59.

The spelling of 20980761989 in words is "twenty billion, nine hundred eighty million, seven hundred sixty-one thousand, nine hundred eighty-nine".