20733125 has 30 divisors (see below), whose sum is σ = 30182526. Its totient is φ = 14196000.

The previous prime is 20733121. The next prime is 20733133. The reversal of 20733125 is 52133702.

It can be written as a sum of positive squares in 5 ways, for example, as 2079364 + 18653761 = 1442^2 + 4319^2 .

It is not a de Polignac number, because 20733125 - 2² = 20733121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20733125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20733121) by changing a digit.

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 29 ways as a sum of consecutive naturals, for example, 30287 + ... + 30963.

Almost surely, 2^20733125 is an apocalyptic number.

20733125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20733125 is a deficient number, since it is larger than the sum of its proper divisors (9449401).

20733125 is an frugal number, since it uses more digits than its factorization.

20733125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711 (or 689 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 23.

The square root of 20733125 is about 4553.3641409402. The cubic root of 20733125 is about 274.7187206605.

Adding to 20733125 its reverse (52133702), we get a palindrome (72866827).

The spelling of 20733125 in words is "twenty million, seven hundred thirty-three thousand, one hundred twenty-five".