20453470 has 8 divisors (see below), whose sum is σ = 36816264. Its totient is φ = 8181384.

The previous prime is 20453453. The next prime is 20453473. The reversal of 20453470 is 7435402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20453473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1022664 + ... + 1022683.

It is an arithmetic number, because the mean of its divisors is an integer number (4602033).

Almost surely, 2^20453470 is an apocalyptic number.

20453470 is a deficient number, since it is larger than the sum of its proper divisors (16362794).

20453470 is a wasteful number, since it uses less digits than its factorization.

20453470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2045354.

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 20453470 is about 4522.5512711300. The cubic root of 20453470 is about 273.4779606739.

Adding to 20453470 its reverse (7435402), we get a palindrome (27888872).

The spelling of 20453470 in words is "twenty million, four hundred fifty-three thousand, four hundred seventy".