1920432545 has 8 divisors (see below), whose sum is σ = 2305342824. Its totient is φ = 1535796864.

The previous prime is 1920432511. The next prime is 1920432559. The reversal of 1920432545 is 5452340291.

It can be written as a sum of positive squares in 4 ways, for example, as 457446544 + 1462986001 = 21388^2 + 38249^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1920432545 - 2¹⁴ = 1920416161 is a prime.

It is a super-2 number, since 2×1920432545² = 7376122319790354050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52934 + ... + 81503.

It is an arithmetic number, because the mean of its divisors is an integer number (288167853).

Almost surely, 2^1920432545 is an apocalyptic number.

It is an amenable number.

1920432545 is a deficient number, since it is larger than the sum of its proper divisors (384910279).

1920432545 is a wasteful number, since it uses less digits than its factorization.

1920432545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137299.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 1920432545 is about 43822.7400444107. The cubic root of 1920432545 is about 1242.9863299488.

The spelling of 1920432545 in words is "one billion, nine hundred twenty million, four hundred thirty-two thousand, five hundred forty-five".