1820873427 has 16 divisors (see below), whose sum is σ = 2512702752. Its totient is φ = 1172090880.

The previous prime is 1820873393. The next prime is 1820873429. The reversal of 1820873427 is 7243780281.

It is not a de Polignac number, because 1820873427 - 2¹¹ = 1820871379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1820873429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64378 + ... + 88239.

It is an arithmetic number, because the mean of its divisors is an integer number (157043922).

Almost surely, 2^1820873427 is an apocalyptic number.

1820873427 is a deficient number, since it is larger than the sum of its proper divisors (691829325).

1820873427 is a wasteful number, since it uses less digits than its factorization.

1820873427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152758.

The product of its (nonzero) digits is 150528, while the sum is 42.

The square root of 1820873427 is about 42671.6935098667. The cubic root of 1820873427 is about 1221.1244284906.

The spelling of 1820873427 in words is "one billion, eight hundred twenty million, eight hundred seventy-three thousand, four hundred twenty-seven".