20513622 has 8 divisors (see below), whose sum is σ = 41027256. Its totient is φ = 6837872.

The previous prime is 20513621. The next prime is 20513627. The reversal of 20513622 is 22631502.

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

20513622 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20513621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1709463 + ... + 1709474.

It is an arithmetic number, because the mean of its divisors is an integer number (5128407).

Almost surely, 2^20513622 is an apocalyptic number.

20513622 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20513622 is a wasteful number, since it uses less digits than its factorization.

20513622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3418942.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 20513622 is about 4529.1966175029. The cubic root of 20513622 is about 273.7457904734.

The spelling of 20513622 in words is "twenty million, five hundred thirteen thousand, six hundred twenty-two".