1820739213 has 12 divisors (see below), whose sum is σ = 2714794368. Its totient is φ = 1174670280.

The previous prime is 1820739197. The next prime is 1820739229. The reversal of 1820739213 is 3129370281.

It is an interprime number because it is at equal distance from previous prime (1820739197) and next prime (1820739229).

It is not a de Polignac number, because 1820739213 - 2⁴ = 1820739197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1820739013) 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, 3262695 + ... + 3263252.

It is an arithmetic number, because the mean of its divisors is an integer number (226232864).

Almost surely, 2^1820739213 is an apocalyptic number.

It is an amenable number.

1820739213 is a deficient number, since it is larger than the sum of its proper divisors (894055155).

1820739213 is a wasteful number, since it uses less digits than its factorization.

1820739213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6525984 (or 6525981 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 1820739213 is about 42670.1208458565. The cubic root of 1820739213 is about 1221.0944253030.

The spelling of 1820739213 in words is "one billion, eight hundred twenty million, seven hundred thirty-nine thousand, two hundred thirteen".