20436426 has 24 divisors (see below), whose sum is σ = 44815680. Its totient is φ = 6729576.

The previous prime is 20436413. The next prime is 20436433. The reversal of 20436426 is 62463402.

20436426 is a `hidden beast` number, since 204 + 36 + 426 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 20436426.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5346 + ... + 8333.

It is an arithmetic number, because the mean of its divisors is an integer number (1867320).

Almost surely, 2^20436426 is an apocalyptic number.

20436426 is an abundant number, since it is smaller than the sum of its proper divisors (24379254).

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

20436426 is a wasteful number, since it uses less digits than its factorization.

20436426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13770 (or 13767 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 20436426 is about 4520.6665437743. Note that the first 3 decimals coincide. The cubic root of 20436426 is about 273.4019759521.

Adding to 20436426 its reverse (62463402), we get a palindrome (82899828).

The spelling of 20436426 in words is "twenty million, four hundred thirty-six thousand, four hundred twenty-six".