2027189905 has 32 divisors (see below), whose sum is σ = 2802600864. Its totient is φ = 1394343936.

The previous prime is 2027189891. The next prime is 2027189911. The reversal of 2027189905 is 5099817202.

It can be written as a sum of positive squares in 16 ways, for example, as 106646929 + 1920542976 = 10327^2 + 43824^2 .

It is a cyclic number.

It is not a de Polignac number, because 2027189905 - 2⁷ = 2027189777 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 97729 + ... + 116641.

It is an arithmetic number, because the mean of its divisors is an integer number (87581277).

Almost surely, 2^2027189905 is an apocalyptic number.

It is an amenable number.

2027189905 is a deficient number, since it is larger than the sum of its proper divisors (775410959).

2027189905 is a wasteful number, since it uses less digits than its factorization.

2027189905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19045.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 2027189905 is about 45024.3257028909. The cubic root of 2027189905 is about 1265.6048922721.

The spelling of 2027189905 in words is "two billion, twenty-seven million, one hundred eighty-nine thousand, nine hundred five".