20452019 has 16 divisors (see below), whose sum is σ = 23974656. Its totient is φ = 17085600.

The previous prime is 20452007. The next prime is 20452021. The reversal of 20452019 is 91025402.

It is a de Polignac number, because none of the positive numbers 2^k-20452019 is a prime.

It is a super-2 number, since 2×20452019² = 836570162352722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20451985 and 20452003.

It is not an unprimeable number, because it can be changed into a prime (20452039) 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, 89984 + ... + 90210.

It is an arithmetic number, because the mean of its divisors is an integer number (1498416).

Almost surely, 2^20452019 is an apocalyptic number.

20452019 is a deficient number, since it is larger than the sum of its proper divisors (3522637).

20452019 is a wasteful number, since it uses less digits than its factorization.

20452019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 20452019 is about 4522.3908499819. The cubic root of 20452019 is about 273.4714935414.

The spelling of 20452019 in words is "twenty million, four hundred fifty-two thousand, nineteen".