20545814 has 4 divisors (see below), whose sum is σ = 30818724. Its totient is φ = 10272906.

The previous prime is 20545807. The next prime is 20545817. The reversal of 20545814 is 41854502.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20545817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5136452 + ... + 5136455.

It is an arithmetic number, because the mean of its divisors is an integer number (7704681).

Almost surely, 2^20545814 is an apocalyptic number.

20545814 is a deficient number, since it is larger than the sum of its proper divisors (10272910).

20545814 is a wasteful number, since it uses less digits than its factorization.

20545814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10272909.

The product of its (nonzero) digits is 6400, while the sum is 29.

The square root of 20545814 is about 4532.7490554850. The cubic root of 20545814 is about 273.8889119356. Note that the first 3 decimals are identical.

The spelling of 20545814 in words is "twenty million, five hundred forty-five thousand, eight hundred fourteen".