20424019 has 8 divisors (see below), whose sum is σ = 25463808. Its totient is φ = 15914760.

The previous prime is 20423989. The next prime is 20424043. The reversal of 20424019 is 91042402.

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

It is a cyclic number.

It is not a de Polignac number, because 20424019 - 2⁷ = 20423891 is a prime.

It is a super-2 number, since 2×20424019² = 834281104224722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20424049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132547 + ... + 132700.

It is an arithmetic number, because the mean of its divisors is an integer number (3182976).

Almost surely, 2^20424019 is an apocalyptic number.

20424019 is a deficient number, since it is larger than the sum of its proper divisors (5039789).

20424019 is a wasteful number, since it uses less digits than its factorization.

20424019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265265.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 20424019 is about 4519.2940820442. The cubic root of 20424019 is about 273.3466371012.

The spelling of 20424019 in words is "twenty million, four hundred twenty-four thousand, nineteen".