20719272 has 64 divisors (see below), whose sum is σ = 62323200. Its totient is φ = 5607360.

The previous prime is 20719271. The next prime is 20719273. The reversal of 20719272 is 27291702.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20719271) and next prime (20719273).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20719271) 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 15 ways as a sum of consecutive naturals, for example, 54 + ... + 6437.

It is an arithmetic number, because the mean of its divisors is an integer number (973800).

Almost surely, 2^20719272 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20719272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31161600).

20719272 is an abundant number, since it is smaller than the sum of its proper divisors (41603928).

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

20719272 is a wasteful number, since it uses less digits than its factorization.

20719272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6526 (or 6522 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 20719272 is about 4551.8427037849. The cubic root of 20719272 is about 274.6575218727.

The spelling of 20719272 in words is "twenty million, seven hundred nineteen thousand, two hundred seventy-two".