20541562 has 4 divisors (see below), whose sum is σ = 30812346. Its totient is φ = 10270780.

The previous prime is 20541557. The next prime is 20541571. The reversal of 20541562 is 26514502.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 18931201 + 1610361 = 4351^2 + 1269^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5135389 + ... + 5135392.

Almost surely, 2^20541562 is an apocalyptic number.

20541562 is a deficient number, since it is larger than the sum of its proper divisors (10270784).

20541562 is a wasteful number, since it uses less digits than its factorization.

20541562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10270783.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 20541562 is about 4532.2800001765. The cubic root of 20541562 is about 273.8700166674.

The spelling of 20541562 in words is "twenty million, five hundred forty-one thousand, five hundred sixty-two".