20613534 has 8 divisors (see below), whose sum is σ = 41227080. Its totient is φ = 6871176.

The previous prime is 20613533. The next prime is 20613563. The reversal of 20613534 is 43531602.

It is a happy number.

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

20613534 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20613533) by changing a digit.

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, 1717789 + ... + 1717800.

It is an arithmetic number, because the mean of its divisors is an integer number (5153385).

Almost surely, 2^20613534 is an apocalyptic number.

20613534 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.

20613534 is a wasteful number, since it uses less digits than its factorization.

20613534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3435594.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 20613534 is about 4540.2129905986. The cubic root of 20613534 is about 274.1894989757.

The spelling of 20613534 in words is "twenty million, six hundred thirteen thousand, five hundred thirty-four".