1825636420 has 24 divisors (see below), whose sum is σ = 3966039000. Its totient is φ = 705073152.

The previous prime is 1825636399. The next prime is 1825636429. The reversal of 1825636420 is 246365281.

It can be written as a sum of positive squares in 4 ways, for example, as 115648516 + 1709987904 = 10754^2 + 41352^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1825636420.

It is not an unprimeable number, because it can be changed into a prime (1825636429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1573245 + ... + 1574404.

It is an arithmetic number, because the mean of its divisors is an integer number (165251625).

Almost surely, 2^1825636420 is an apocalyptic number.

1825636420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1825636420 is an abundant number, since it is smaller than the sum of its proper divisors (2140402580).

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

1825636420 is a wasteful number, since it uses less digits than its factorization.

1825636420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3147687 (or 3147685 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 1825636420 is about 42727.4668100041. The cubic root of 1825636420 is about 1222.1882299025.

The spelling of 1825636420 in words is "one billion, eight hundred twenty-five million, six hundred thirty-six thousand, four hundred twenty".