20719608 has 128 divisors (see below), whose sum is σ = 65318400. Its totient is φ = 5331456.

The previous prime is 20719603. The next prime is 20719631. The reversal of 20719608 is 80691702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20719603) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 115663 + ... + 115841.

It is an arithmetic number, because the mean of its divisors is an integer number (510300).

Almost surely, 2^20719608 is an apocalyptic number.

20719608 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20719608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32659200).

20719608 is an abundant number, since it is smaller than the sum of its proper divisors (44598792).

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

20719608 is a wasteful number, since it uses less digits than its factorization.

20719608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261 (or 257 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 20719608 is about 4551.8796117648. The cubic root of 20719608 is about 274.6590065521.

The spelling of 20719608 in words is "twenty million, seven hundred nineteen thousand, six hundred eight".