20541525 has 24 divisors (see below), whose sum is σ = 35961984. Its totient is φ = 10310400.

The previous prime is 20541523. The next prime is 20541557. The reversal of 20541525 is 52514502.

It is a happy number.

It is not a de Polignac number, because 20541525 - 2¹ = 20541523 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20541495 and 20541504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20541523) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6781 + ... + 9330.

It is an arithmetic number, because the mean of its divisors is an integer number (1498416).

Almost surely, 2^20541525 is an apocalyptic number.

20541525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20541525 is a deficient number, since it is larger than the sum of its proper divisors (15420459).

20541525 is a wasteful number, since it uses less digits than its factorization.

20541525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16141 (or 16136 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 20541525 is about 4532.2759183439. The cubic root of 20541525 is about 273.8698522333.

The spelling of 20541525 in words is "twenty million, five hundred forty-one thousand, five hundred twenty-five".