2030199981 has 4 divisors (see below), whose sum is σ = 2706933312. Its totient is φ = 1353466652.

The previous prime is 2030199967. The next prime is 2030200001. The reversal of 2030199981 is 1899910302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2030199981 - 2⁹ = 2030199469 is a prime.

It is a super-2 number, since 2×2030199981² = 8243423925704800722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2030199901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 338366661 + ... + 338366666.

It is an arithmetic number, because the mean of its divisors is an integer number (676733328).

Almost surely, 2^2030199981 is an apocalyptic number.

It is an amenable number.

2030199981 is a deficient number, since it is larger than the sum of its proper divisors (676733331).

2030199981 is an equidigital number, since it uses as much as digits as its factorization.

2030199981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676733330.

The product of its (nonzero) digits is 34992, while the sum is 42.

The square root of 2030199981 is about 45057.7405225784. The cubic root of 2030199981 is about 1266.2309942650.

The spelling of 2030199981 in words is "two billion, thirty million, one hundred ninety-nine thousand, nine hundred eighty-one".