20729334 has 8 divisors (see below), whose sum is σ = 41458680. Its totient is φ = 6909776.

The previous prime is 20729329. The next prime is 20729339. The reversal of 20729334 is 43392702.

It is an interprime number because it is at equal distance from previous prime (20729329) and next prime (20729339).

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

20729334 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20729339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1727439 + ... + 1727450.

It is an arithmetic number, because the mean of its divisors is an integer number (5182335).

Almost surely, 2^20729334 is an apocalyptic number.

20729334 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.

20729334 is a wasteful number, since it uses less digits than its factorization.

20729334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3454894.

The product of its (nonzero) digits is 9072, while the sum is 30.

The square root of 20729334 is about 4552.9478362924. The cubic root of 20729334 is about 274.7019757631.

The spelling of 20729334 in words is "twenty million, seven hundred twenty-nine thousand, three hundred thirty-four".