20558461 has 8 divisors (see below), whose sum is σ = 25631424. Its totient is φ = 16019520.

The previous prime is 20558443. The next prime is 20558557. The reversal of 20558461 is 16485502.

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

It is not a de Polignac number, because 20558461 - 2⁹ = 20557949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20558861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133420 + ... + 133573.

It is an arithmetic number, because the mean of its divisors is an integer number (3203928).

Almost surely, 2^20558461 is an apocalyptic number.

It is an amenable number.

20558461 is a deficient number, since it is larger than the sum of its proper divisors (5072963).

20558461 is a wasteful number, since it uses less digits than its factorization.

20558461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267011.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 20558461 is about 4534.1439103760. The cubic root of 20558461 is about 273.9450979561.

The spelling of 20558461 in words is "twenty million, five hundred fifty-eight thousand, four hundred sixty-one".