20174420 has 24 divisors (see below), whose sum is σ = 48418944. Its totient is φ = 6916896.

The previous prime is 20174417. The next prime is 20174423. The reversal of 20174420 is 2447102.

It is an interprime number because it is at equal distance from previous prime (20174417) and next prime (20174423).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 20174392 and 20174401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20174423) 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 7 ways as a sum of consecutive naturals, for example, 71912 + ... + 72191.

It is an arithmetic number, because the mean of its divisors is an integer number (2017456).

Almost surely, 2^20174420 is an apocalyptic number.

20174420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20174420 is an abundant number, since it is smaller than the sum of its proper divisors (28244524).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20174420 is a wasteful number, since it uses less digits than its factorization.

20174420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144119 (or 144117 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 20174420 is about 4491.5943717126. The cubic root of 20174420 is about 272.2285600511.

The spelling of 20174420 in words is "twenty million, one hundred seventy-four thousand, four hundred twenty".