1650020573 has 4 divisors (see below), whose sum is σ = 1668560220. Its totient is φ = 1631480928.

The previous prime is 1650020549. The next prime is 1650020579. The reversal of 1650020573 is 3750200561.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 988347844 + 661672729 = 31438^2 + 25723^2 .

It is a cyclic number.

It is not a de Polignac number, because 1650020573 - 2²⁰ = 1648971997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1650020579) 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, 9269690 + ... + 9269867.

It is an arithmetic number, because the mean of its divisors is an integer number (417140055).

Almost surely, 2^1650020573 is an apocalyptic number.

It is an amenable number.

1650020573 is a deficient number, since it is larger than the sum of its proper divisors (18539647).

1650020573 is an equidigital number, since it uses as much as digits as its factorization.

1650020573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18539646.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 1650020573 is about 40620.4452585148. The cubic root of 1650020573 is about 1181.6706616409.

It can be divided in two parts, 16500 and 20573, that added together give a palindrome (37073).

The spelling of 1650020573 in words is "one billion, six hundred fifty million, twenty thousand, five hundred seventy-three".