1820249355 has 16 divisors (see below), whose sum is σ = 2914562304. Its totient is φ = 970078560.

The previous prime is 1820249339. The next prime is 1820249359. The reversal of 1820249355 is 5539420281.

It is not a de Polignac number, because 1820249355 - 2⁴ = 1820249339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1820249359) 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, 23881 + ... + 64890.

It is an arithmetic number, because the mean of its divisors is an integer number (182160144).

Almost surely, 2^1820249355 is an apocalyptic number.

1820249355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1820249355 is a deficient number, since it is larger than the sum of its proper divisors (1094312949).

1820249355 is a wasteful number, since it uses less digits than its factorization.

1820249355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90146.

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 1820249355 is about 42664.3804009856. The cubic root of 1820249355 is about 1220.9849063192.

The spelling of 1820249355 in words is "one billion, eight hundred twenty million, two hundred forty-nine thousand, three hundred fifty-five".