1920945537 has 20 divisors (see below), whose sum is σ = 3279498816. Its totient is φ = 1097682840.

The previous prime is 1920945517. The next prime is 1920945547. The reversal of 1920945537 is 7355490291.

It is a happy number.

1920945537 is a `hidden beast` number, since 1 + 9 + 2 + 0 + 94 + 553 + 7 = 666.

It is not a de Polignac number, because 1920945537 - 2²⁰ = 1919896961 is a prime.

It is a super-2 number, since 2×1920945537² = 7380063512240436738, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1920945492 and 1920945501.

It is not an unprimeable number, because it can be changed into a prime (1920945517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1693389 + ... + 1694522.

Almost surely, 2^1920945537 is an apocalyptic number.

It is an amenable number.

1920945537 is a deficient number, since it is larger than the sum of its proper divisors (1358553279).

1920945537 is an equidigital number, since it uses as much as digits as its factorization.

1920945537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3387930 (or 3387921 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 45.

The square root of 1920945537 is about 43828.5926878790. The cubic root of 1920945537 is about 1243.0969969054.

It can be divided in two parts, 19209 and 45537, that added together give a palindrome (64746).

The spelling of 1920945537 in words is "one billion, nine hundred twenty million, nine hundred forty-five thousand, five hundred thirty-seven".