20439419 has 24 divisors (see below), whose sum is σ = 27942768. Its totient is φ = 14696640.

The previous prime is 20439379. The next prime is 20439439. The reversal of 20439419 is 91493402.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-20439419 is a prime.

It is a super-2 number, since 2×20439419² = 835539698115122, which contains 22 as substring.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20439439) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5549 + ... + 8465.

It is an arithmetic number, because the mean of its divisors is an integer number (1164282).

Almost surely, 2^20439419 is an apocalyptic number.

20439419 is a deficient number, since it is larger than the sum of its proper divisors (7503349).

20439419 is a wasteful number, since it uses less digits than its factorization.

20439419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2955 (or 2948 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 20439419 is about 4520.9975669093. The cubic root of 20439419 is about 273.4153222546.

The spelling of 20439419 in words is "twenty million, four hundred thirty-nine thousand, four hundred nineteen".