20719151 has 8 divisors (see below), whose sum is σ = 21233664. Its totient is φ = 20207800.

The previous prime is 20719121. The next prime is 20719157. The reversal of 20719151 is 15191702.

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

It is a cyclic number.

It is not a de Polignac number, because 20719151 - 2⁶ = 20719087 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20719151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20719157) 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 7 ways as a sum of consecutive naturals, for example, 17426 + ... + 18576.

It is an arithmetic number, because the mean of its divisors is an integer number (2654208).

Almost surely, 2^20719151 is an apocalyptic number.

20719151 is a deficient number, since it is larger than the sum of its proper divisors (514513).

20719151 is a wasteful number, since it uses less digits than its factorization.

20719151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1581.

The product of its (nonzero) digits is 630, while the sum is 26.

The square root of 20719151 is about 4551.8294124451. The cubic root of 20719151 is about 274.6569872075.

The spelling of 20719151 in words is "twenty million, seven hundred nineteen thousand, one hundred fifty-one".