19926145 has 8 divisors (see below), whose sum is σ = 24362856. Its totient is φ = 15639936.

The previous prime is 19926143. The next prime is 19926209. The reversal of 19926145 is 54162991.

It can be written as a sum of positive squares in 4 ways, for example, as 2852721 + 17073424 = 1689^2 + 4132^2 .

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 19926145 - 2¹ = 19926143 is a prime.

It is a super-2 number, since 2×19926145² = 794102509122050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19926143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37332 + ... + 37861.

It is an arithmetic number, because the mean of its divisors is an integer number (3045357).

Almost surely, 2^19926145 is an apocalyptic number.

It is an amenable number.

19926145 is a deficient number, since it is larger than the sum of its proper divisors (4436711).

19926145 is an equidigital number, since it uses as much as digits as its factorization.

19926145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75251.

The product of its digits is 19440, while the sum is 37.

The square root of 19926145 is about 4463.8710778874. The cubic root of 19926145 is about 271.1072273486.

The spelling of 19926145 in words is "nineteen million, nine hundred twenty-six thousand, one hundred forty-five".