20453356 has 36 divisors (see below), whose sum is σ = 44971024. Its totient is φ = 7967520.

The previous prime is 20453327. The next prime is 20453401. The reversal of 20453356 is 65335402.

20453356 = T₃₅ + T₃₆ + ... + T₄₉₆.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 370 + ... + 6406.

Almost surely, 2^20453356 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20453356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22485512).

20453356 is an abundant number, since it is smaller than the sum of its proper divisors (24517668).

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

20453356 is a wasteful number, since it uses less digits than its factorization.

20453356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6070 (or 6057 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 28.

The square root of 20453356 is about 4522.5386676069. The cubic root of 20453356 is about 273.4774525850.

Adding to 20453356 its reverse (65335402), we get a palindrome (85788758).

The spelling of 20453356 in words is "twenty million, four hundred fifty-three thousand, three hundred fifty-six".