20420124 has 24 divisors (see below), whose sum is σ = 47998608. Its totient is φ = 6756480.

The previous prime is 20420119. The next prime is 20420129. The reversal of 20420124 is 42102402.

It is an interprime number because it is at equal distance from previous prime (20420119) and next prime (20420129).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20420129) 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, 4567 + ... + 7854.

It is an arithmetic number, because the mean of its divisors is an integer number (1999942).

Almost surely, 2^20420124 is an apocalyptic number.

It is an amenable number.

20420124 is an abundant number, since it is smaller than the sum of its proper divisors (27578484).

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

20420124 is a wasteful number, since it uses less digits than its factorization.

20420124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12565 (or 12563 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 20420124 is about 4518.8631313639. The cubic root of 20420124 is about 273.3292596392.

Adding to 20420124 its reverse (42102402), we get a palindrome (62522526).

The spelling of 20420124 in words is "twenty million, four hundred twenty thousand, one hundred twenty-four".