20850419 has 4 divisors (see below), whose sum is σ = 20860944. Its totient is φ = 20839896.

The previous prime is 20850409. The next prime is 20850437. The reversal of 20850419 is 91405802.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 91405802 = 2 ⋅45702901.

It is a cyclic number.

It is not a de Polignac number, because 20850419 - 2²⁴ = 4073203 is a prime.

It is a super-2 number, since 2×20850419² = 869479944951122, 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 = 20850391 and 20850400.

It is not an unprimeable number, because it can be changed into a prime (20850409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1292 + ... + 6585.

It is an arithmetic number, because the mean of its divisors is an integer number (5215236).

Almost surely, 2^20850419 is an apocalyptic number.

20850419 is a deficient number, since it is larger than the sum of its proper divisors (10525).

20850419 is an equidigital number, since it uses as much as digits as its factorization.

20850419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10524.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 20850419 is about 4566.2259033035. The cubic root of 20850419 is about 275.2358043585.

The spelling of 20850419 in words is "twenty million, eight hundred fifty thousand, four hundred nineteen".