1236670020 has 36 divisors (see below), whose sum is σ = 3751232940. Its totient is φ = 329778624.

The previous prime is 1236669989. The next prime is 1236670021. The reversal of 1236670020 is 200766321.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 763085376 + 473584644 = 27624^2 + 21762^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (1236670021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3435015 + ... + 3435374.

It is an arithmetic number, because the mean of its divisors is an integer number (104200915).

Almost surely, 2^1236670020 is an apocalyptic number.

1236670020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1236670020 is an abundant number, since it is smaller than the sum of its proper divisors (2514562920).

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

1236670020 is a wasteful number, since it uses less digits than its factorization.

1236670020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6870404 (or 6870399 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 1236670020 is about 35166.3193979694. The cubic root of 1236670020 is about 1073.3745096489.

The spelling of 1236670020 in words is "one billion, two hundred thirty-six million, six hundred seventy thousand, twenty".