2019970181 has 2 divisors, whose sum is σ = 2019970182. Its totient is φ = 2019970180.

The previous prime is 2019970163. The next prime is 2019970187. The reversal of 2019970181 is 1810799102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1508079556 + 511890625 = 38834^2 + 22625^2 .

It is a cyclic number.

It is not a de Polignac number, because 2019970181 - 2¹⁴ = 2019953797 is a prime.

It is a super-2 number, since 2×2019970181² = 8160559064258345522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2019970187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1009985090 + 1009985091.

It is an arithmetic number, because the mean of its divisors is an integer number (1009985091).

Almost surely, 2^2019970181 is an apocalyptic number.

It is an amenable number.

2019970181 is a deficient number, since it is larger than the sum of its proper divisors (1).

2019970181 is an equidigital number, since it uses as much as digits as its factorization.

2019970181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 38.

The square root of 2019970181 is about 44944.0783752432. The cubic root of 2019970181 is about 1264.1006446342.

The spelling of 2019970181 in words is "two billion, nineteen million, nine hundred seventy thousand, one hundred eighty-one".