20453456 has 10 divisors (see below), whose sum is σ = 39628602. Its totient is φ = 10226720.

The previous prime is 20453453. The next prime is 20453473. The reversal of 20453456 is 65435402.

It can be written as a sum of positive squares in only one way, i.e., 13249600 + 7203856 = 3640^2 + 2684^2 .

It is a super-3 number, since 3×20453456³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20453453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639155 + ... + 639186.

Almost surely, 2^20453456 is an apocalyptic number.

It is an amenable number.

20453456 is a deficient number, since it is larger than the sum of its proper divisors (19175146).

20453456 is a wasteful number, since it uses less digits than its factorization.

20453456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1278349 (or 1278343 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 20453456 is about 4522.5497233309. The cubic root of 20453456 is about 273.4778982772.

Adding to 20453456 its reverse (65435402), we get a palindrome (85888858).

The spelling of 20453456 in words is "twenty million, four hundred fifty-three thousand, four hundred fifty-six".