1620936020 has 48 divisors (see below), whose sum is σ = 3716387136. Its totient is φ = 588960000.

The previous prime is 1620936011. The next prime is 1620936067. The reversal of 1620936020 is 206390261.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 394175 + ... + 398265.

It is an arithmetic number, because the mean of its divisors is an integer number (77424732).

Almost surely, 2^1620936020 is an apocalyptic number.

1620936020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1620936020 is an abundant number, since it is smaller than the sum of its proper divisors (2095451116).

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

1620936020 is a wasteful number, since it uses less digits than its factorization.

1620936020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5912 (or 5910 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 1620936020 is about 40260.8497178090. The cubic root of 1620936020 is about 1174.6864459856.

The spelling of 1620936020 in words is "one billion, six hundred twenty million, nine hundred thirty-six thousand, twenty".