20498725 has 12 divisors (see below), whose sum is σ = 27374116. Its totient is φ = 15137280.

The previous prime is 20498707. The next prime is 20498741. The reversal of 20498725 is 52789402.

It can be written as a sum of positive squares in 6 ways, for example, as 8485569 + 12013156 = 2913^2 + 3466^2 .

It is not a de Polignac number, because 20498725 - 2¹⁵ = 20465957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31212 + ... + 31861.

Almost surely, 2^20498725 is an apocalyptic number.

20498725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20498725 is a deficient number, since it is larger than the sum of its proper divisors (6875391).

20498725 is a wasteful number, since it uses less digits than its factorization.

20498725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63096 (or 63091 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 20498725 is about 4527.5517666836. The cubic root of 20498725 is about 273.6795096612.

The spelling of 20498725 in words is "twenty million, four hundred ninety-eight thousand, seven hundred twenty-five".