3200020981 has 12 divisors (see below), whose sum is σ = 3350018700. Its totient is φ = 3056482880.

The previous prime is 3200020939. The next prime is 3200020987. The reversal of 3200020981 is 1890200023.

It can be written as a sum of positive squares in 2 ways, for example, as 502880625 + 2697140356 = 22425^2 + 51934^2 .

It is not a de Polignac number, because 3200020981 - 2⁷ = 3200020853 is a prime.

It is a super-2 number, since 2×3200020981² = 20480268557680404722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3200020987) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 398595 + ... + 406543.

It is an arithmetic number, because the mean of its divisors is an integer number (279168225).

Almost surely, 2^3200020981 is an apocalyptic number.

It is an amenable number.

3200020981 is a deficient number, since it is larger than the sum of its proper divisors (149997719).

3200020981 is an equidigital number, since it uses as much as digits as its factorization.

3200020981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8756 (or 8733 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 3200020981 is about 56568.7279422120. The cubic root of 3200020981 is about 1473.6158200602.

The spelling of 3200020981 in words is "three billion, two hundred million, twenty thousand, nine hundred eighty-one".