20734538 has 8 divisors (see below), whose sum is σ = 33929280. Its totient is φ = 9424780.

The previous prime is 20734531. The next prime is 20734559. The reversal of 20734538 is 83543702.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (20734531) 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, 471218 + ... + 471261.

It is an arithmetic number, because the mean of its divisors is an integer number (4241160).

Almost surely, 2^20734538 is an apocalyptic number.

20734538 is a deficient number, since it is larger than the sum of its proper divisors (13194742).

20734538 is a wasteful number, since it uses less digits than its factorization.

20734538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942492.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 20734538 is about 4553.5192983010. The cubic root of 20734538 is about 274.7249613781.

The spelling of 20734538 in words is "twenty million, seven hundred thirty-four thousand, five hundred thirty-eight".