20738919 has 8 divisors (see below), whose sum is σ = 27673072. Its totient is φ = 13815360.

The previous prime is 20738917. The next prime is 20738933. The reversal of 20738919 is 91983702.

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

It is not a de Polignac number, because 20738919 - 2¹ = 20738917 is a prime.

It is a super-2 number, since 2×20738919² = 860205522577122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20738917) 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, 5547 + ... + 8499.

It is an arithmetic number, because the mean of its divisors is an integer number (3459134).

Almost surely, 2^20738919 is an apocalyptic number.

20738919 is a deficient number, since it is larger than the sum of its proper divisors (6934153).

20738919 is a wasteful number, since it uses less digits than its factorization.

20738919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5297.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 20738919 is about 4554.0003293808. Note that the first 3 decimals coincide. The cubic root of 20738919 is about 274.7443088922.

The spelling of 20738919 in words is "twenty million, seven hundred thirty-eight thousand, nine hundred nineteen".