20581622 has 8 divisors (see below), whose sum is σ = 31307472. Its totient is φ = 10145800.

The previous prime is 20581609. The next prime is 20581643. The reversal of 20581622 is 22618502.

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

It is a junction number, because it is equal to n+sod(n) for n = 20581591 and 20581600.

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, 72329 + ... + 72612.

It is an arithmetic number, because the mean of its divisors is an integer number (3913434).

Almost surely, 2^20581622 is an apocalyptic number.

20581622 is a deficient number, since it is larger than the sum of its proper divisors (10725850).

20581622 is a wasteful number, since it uses less digits than its factorization.

20581622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145014.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 20581622 is about 4536.6972568158. The cubic root of 20581622 is about 274.0479341432.

The spelling of 20581622 in words is "twenty million, five hundred eighty-one thousand, six hundred twenty-two".