1820525253 has 16 divisors (see below), whose sum is σ = 2436189696. Its totient is φ = 1209282560.

The previous prime is 1820525243. The next prime is 1820525293. The reversal of 1820525253 is 3525250281.

It is a cyclic number.

It is not a de Polignac number, because 1820525253 - 2¹⁰ = 1820524229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1820525243) 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, 1659001 + ... + 1660097.

It is an arithmetic number, because the mean of its divisors is an integer number (152261856).

Almost surely, 2^1820525253 is an apocalyptic number.

It is an amenable number.

1820525253 is a deficient number, since it is larger than the sum of its proper divisors (615664443).

1820525253 is a wasteful number, since it uses less digits than its factorization.

1820525253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2604.

The product of its (nonzero) digits is 24000, while the sum is 33.

The square root of 1820525253 is about 42667.6136314184. The cubic root of 1820525253 is about 1221.0465920574.

The spelling of 1820525253 in words is "one billion, eight hundred twenty million, five hundred twenty-five thousand, two hundred fifty-three".