20420410 has 12 divisors (see below), whose sum is σ = 36782478. Its totient is φ = 8162448.

The previous prime is 20420377. The next prime is 20420443. The reversal of 20420410 is 1402402.

It is an interprime number because it is at equal distance from previous prime (20420377) and next prime (20420443).

It can be written as a sum of positive squares in 3 ways, for example, as 6215049 + 14205361 = 2493^2 + 3769^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13576 + ... + 15004.

Almost surely, 2^20420410 is an apocalyptic number.

20420410 is a deficient number, since it is larger than the sum of its proper divisors (16362068).

20420410 is an frugal number, since it uses more digits than its factorization.

20420410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2865 (or 1436 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 20420410 is about 4518.8947763806. The cubic root of 20420410 is about 273.3305356975.

Adding to 20420410 its reverse (1402402), we get a palindrome (21822812).

The spelling of 20420410 in words is "twenty million, four hundred twenty thousand, four hundred ten".