20623419 has 6 divisors (see below), whose sum is σ = 29789396. Its totient is φ = 13748940.

The previous prime is 20623411. The next prime is 20623439. The reversal of 20623419 is 91432602.

20623419 is a `hidden beast` number, since 20 + 623 + 4 + 19 = 666.

It is not a de Polignac number, because 20623419 - 2³ = 20623411 is a prime.

It is a super-2 number, since 2×20623419² = 850650822499122, 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 = 20623392 and 20623401.

It is not an unprimeable number, because it can be changed into a prime (20623411) 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 5 ways as a sum of consecutive naturals, for example, 1145737 + ... + 1145754.

Almost surely, 2^20623419 is an apocalyptic number.

20623419 is a deficient number, since it is larger than the sum of its proper divisors (9165977).

20623419 is a wasteful number, since it uses less digits than its factorization.

20623419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2291497 (or 2291494 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 20623419 is about 4541.3014654392. The cubic root of 20623419 is about 274.2333201867.

The spelling of 20623419 in words is "twenty million, six hundred twenty-three thousand, four hundred nineteen".