1920544964 has 12 divisors (see below), whose sum is σ = 3619488684. Its totient is φ = 886405344.

The previous prime is 1920544963. The next prime is 1920544987. The reversal of 1920544964 is 4694450291.

It can be written as a sum of positive squares in 2 ways, for example, as 205922500 + 1714622464 = 14350^2 + 41408^2 .

It is a super-2 number, since 2×1920544964² = 7376985917491522592, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1920544963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18466727 + ... + 18466830.

It is an arithmetic number, because the mean of its divisors is an integer number (301624057).

Almost surely, 2^1920544964 is an apocalyptic number.

It is an amenable number.

1920544964 is a deficient number, since it is larger than the sum of its proper divisors (1698943720).

1920544964 is a wasteful number, since it uses less digits than its factorization.

1920544964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36933574 (or 36933572 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 44.

The square root of 1920544964 is about 43824.0226816298. The cubic root of 1920544964 is about 1243.0105836087.

The spelling of 1920544964 in words is "one billion, nine hundred twenty million, five hundred forty-four thousand, nine hundred sixty-four".