20541425 has 18 divisors (see below), whose sum is σ = 26406978. Its totient is φ = 15850240.

The previous prime is 20541419. The next prime is 20541431. The reversal of 20541425 is 52414502.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20541419) and next prime (20541431).

It can be written as a sum of positive squares in 9 ways, for example, as 1216609 + 19324816 = 1103^2 + 4396^2 .

It is not a de Polignac number, because 20541425 - 2²⁴ = 3764209 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 20541425.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 20537 + ... + 21513.

Almost surely, 2^20541425 is an apocalyptic number.

20541425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20541425 is a deficient number, since it is larger than the sum of its proper divisors (5865553).

20541425 is an equidigital number, since it uses as much as digits as its factorization.

20541425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045 (or 1011 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 20541425 is about 4532.2648863455. The cubic root of 20541425 is about 273.8694078160.

Adding to 20541425 its reverse (52414502), we get a palindrome (72955927).

The spelling of 20541425 in words is "twenty million, five hundred forty-one thousand, four hundred twenty-five".