20541597 has 8 divisors (see below), whose sum is σ = 27797856. Its totient is φ = 13489872.

The previous prime is 20541583. The next prime is 20541601. The reversal of 20541597 is 79514502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20541597 - 2¹² = 20537501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20541557) 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 7 ways as a sum of consecutive naturals, for example, 50898 + ... + 51299.

It is an arithmetic number, because the mean of its divisors is an integer number (3474732).

Almost surely, 2^20541597 is an apocalyptic number.

It is an amenable number.

20541597 is a deficient number, since it is larger than the sum of its proper divisors (7256259).

20541597 is a wasteful number, since it uses less digits than its factorization.

20541597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102267.

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 20541597 is about 4532.2838613661. The cubic root of 20541597 is about 273.8701722129.

The spelling of 20541597 in words is "twenty million, five hundred forty-one thousand, five hundred ninety-seven".