20523419 has 8 divisors (see below), whose sum is σ = 24089568. Its totient is φ = 17115840.

The previous prime is 20523407. The next prime is 20523421. The reversal of 20523419 is 91432502.

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

It is a de Polignac number, because none of the positive numbers 2^k-20523419 is a prime.

It is a super-2 number, since 2×20523419² = 842421454899122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20523449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39362 + ... + 39879.

It is an arithmetic number, because the mean of its divisors is an integer number (3011196).

Almost surely, 2^20523419 is an apocalyptic number.

20523419 is a deficient number, since it is larger than the sum of its proper divisors (3566149).

20523419 is an equidigital number, since it uses as much as digits as its factorization.

20523419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79285.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 20523419 is about 4530.2780267882. The cubic root of 20523419 is about 273.7893625070.

The spelling of 20523419 in words is "twenty million, five hundred twenty-three thousand, four hundred nineteen".