20420419 has 8 divisors (see below), whose sum is σ = 21365568. Its totient is φ = 19496640.

The previous prime is 20420377. The next prime is 20420443. The reversal of 20420419 is 91402402.

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 20420419 - 2¹⁵ = 20387651 is a prime.

It is a super-2 number, since 2×20420419² = 833987024271122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20420419.

It is not an unprimeable number, because it can be changed into a prime (20420479) 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, 3372 + ... + 7225.

It is an arithmetic number, because the mean of its divisors is an integer number (2670696).

Almost surely, 2^20420419 is an apocalyptic number.

20420419 is a deficient number, since it is larger than the sum of its proper divisors (945149).

20420419 is a wasteful number, since it uses less digits than its factorization.

20420419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10685.

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

The square root of 20420419 is about 4518.8957721992. The cubic root of 20420419 is about 273.3305758529.

It can be divided in two parts, 2042041 and 9, that multiplied together give a square (18378369 = 4287²).

The spelling of 20420419 in words is "twenty million, four hundred twenty thousand, four hundred nineteen".