20246420 has 12 divisors (see below), whose sum is σ = 42517524. Its totient is φ = 8098560.

The previous prime is 20246399. The next prime is 20246453. The reversal of 20246420 is 2464202.

It can be written as a sum of positive squares in 2 ways, for example, as 14273284 + 5973136 = 3778^2 + 2444^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 1012321 = 20246420 / (2 + 0 + 2 + 4 + 6 + 4 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 20246392 and 20246401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 506141 + ... + 506180.

It is an arithmetic number, because the mean of its divisors is an integer number (3543127).

Almost surely, 2^20246420 is an apocalyptic number.

20246420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20246420 is an abundant number, since it is smaller than the sum of its proper divisors (22271104).

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

20246420 is a wasteful number, since it uses less digits than its factorization.

20246420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012330 (or 1012328 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 20246420 is about 4499.6022046399. The cubic root of 20246420 is about 272.5520255295.

It can be divided in two parts, 20 and 246420, that multiplied together give a square (4928400 = 2220²).

The spelling of 20246420 in words is "twenty million, two hundred forty-six thousand, four hundred twenty".