20612558 has 8 divisors (see below), whose sum is σ = 30944160. Its totient is φ = 10297840.

The previous prime is 20612539. The next prime is 20612561. The reversal of 20612558 is 85521602.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20612558.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 518 + ... + 6441.

It is an arithmetic number, because the mean of its divisors is an integer number (3868020).

Almost surely, 2^20612558 is an apocalyptic number.

20612558 is a deficient number, since it is larger than the sum of its proper divisors (10331602).

20612558 is a wasteful number, since it uses less digits than its factorization.

20612558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8442.

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 20612558 is about 4540.1055053820. The cubic root of 20612558 is about 274.1851715085.

The spelling of 20612558 in words is "twenty million, six hundred twelve thousand, five hundred fifty-eight".