20268445 has 4 divisors (see below), whose sum is σ = 24322140. Its totient is φ = 16214752.

The previous prime is 20268439. The next prime is 20268461. The reversal of 20268445 is 54486202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54486202 = 2 ⋅27243101.

It can be written as a sum of positive squares in 2 ways, for example, as 7387524 + 12880921 = 2718^2 + 3589^2 .

It is a cyclic number.

It is not a de Polignac number, because 20268445 - 2⁷ = 20268317 is a prime.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 2026840 + ... + 2026849.

It is an arithmetic number, because the mean of its divisors is an integer number (6080535).

Almost surely, 2^20268445 is an apocalyptic number.

It is an amenable number.

20268445 is a deficient number, since it is larger than the sum of its proper divisors (4053695).

20268445 is an equidigital number, since it uses as much as digits as its factorization.

20268445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4053694.

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 20268445 is about 4502.0489779655. The cubic root of 20268445 is about 272.6508213151.

The spelling of 20268445 in words is "twenty million, two hundred sixty-eight thousand, four hundred forty-five".