20719011 has 8 divisors (see below), whose sum is σ = 27740944. Its totient is φ = 13754880.

The previous prime is 20718989. The next prime is 20719019. The reversal of 20719011 is 11091702.

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

It is not a de Polignac number, because 20719011 - 2¹¹ = 20716963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20719019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13606 + ... + 15051.

It is an arithmetic number, because the mean of its divisors is an integer number (3467618).

Almost surely, 2^20719011 is an apocalyptic number.

20719011 is a deficient number, since it is larger than the sum of its proper divisors (7021933).

20719011 is a wasteful number, since it uses less digits than its factorization.

20719011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28901.

The product of its (nonzero) digits is 126, while the sum is 21.

The square root of 20719011 is about 4551.8140339869. The cubic root of 20719011 is about 274.6563685839.

The spelling of 20719011 in words is "twenty million, seven hundred nineteen thousand, eleven".