20453444 has 24 divisors (see below), whose sum is σ = 39287808. Its totient is φ = 9239840.

The previous prime is 20453437. The next prime is 20453453. The reversal of 20453444 is 44435402.

It is a super-2 number, since 2×20453444² = 836686742922272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6269 + ... + 8955.

It is an arithmetic number, because the mean of its divisors is an integer number (1636992).

Almost surely, 2^20453444 is an apocalyptic number.

It is an amenable number.

20453444 is a deficient number, since it is larger than the sum of its proper divisors (18834364).

20453444 is a wasteful number, since it uses less digits than its factorization.

20453444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2875 (or 2873 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 26.

The square root of 20453444 is about 4522.5483966454. The cubic root of 20453444 is about 273.4778447942.

Adding to 20453444 its reverse (44435402), we get a palindrome (64888846).

The spelling of 20453444 in words is "twenty million, four hundred fifty-three thousand, four hundred forty-four".