1820525252 has 24 divisors (see below), whose sum is σ = 3921132096. Its totient is φ = 720207648.

The previous prime is 1820525243. The next prime is 1820525293. The reversal of 1820525252 is 2525250281.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

1820525252 is a modest number, since divided by 525252 gives 1820 as remainder.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2500358 + ... + 2501085.

It is an arithmetic number, because the mean of its divisors is an integer number (163380504).

Almost surely, 2^1820525252 is an apocalyptic number.

It is an amenable number.

1820525252 is an abundant number, since it is smaller than the sum of its proper divisors (2100606844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1820525252 is a wasteful number, since it uses less digits than its factorization.

1820525252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5001467 (or 5001465 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 32.

The square root of 1820525252 is about 42667.6136196999. The cubic root of 1820525252 is about 1221.0465918338.

The spelling of 1820525252 in words is "one billion, eight hundred twenty million, five hundred twenty-five thousand, two hundred fifty-two".