20719153 has 16 divisors (see below), whose sum is σ = 25639936. Its totient is φ = 16303680.

The previous prime is 20719121. The next prime is 20719157. The reversal of 20719153 is 35191702.

It is a cyclic number.

It is not a de Polignac number, because 20719153 - 2⁵ = 20719121 is a prime.

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 (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19783 + ... + 20803.

It is an arithmetic number, because the mean of its divisors is an integer number (1602496).

Almost surely, 2^20719153 is an apocalyptic number.

It is an amenable number.

20719153 is a deficient number, since it is larger than the sum of its proper divisors (4920783).

20719153 is a wasteful number, since it uses less digits than its factorization.

20719153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1264.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 20719153 is about 4551.8296321369. The cubic root of 20719153 is about 274.6569960449.

The spelling of 20719153 in words is "twenty million, seven hundred nineteen thousand, one hundred fifty-three".