20541623 has 8 divisors (see below), whose sum is σ = 21778560. Its totient is φ = 19340640.

The previous prime is 20541613. The next prime is 20541629. The reversal of 20541623 is 32614502.

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

It is not a de Polignac number, because 20541623 - 2⁴ = 20541607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20541629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7808 + ... + 10101.

It is an arithmetic number, because the mean of its divisors is an integer number (2722320).

Almost surely, 2^20541623 is an apocalyptic number.

20541623 is a deficient number, since it is larger than the sum of its proper divisors (1236937).

20541623 is a wasteful number, since it uses less digits than its factorization.

20541623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17977.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 20541623 is about 4532.2867296763. The cubic root of 20541623 is about 273.8702877609.

The spelling of 20541623 in words is "twenty million, five hundred forty-one thousand, six hundred twenty-three".