20501893 has 8 divisors (see below), whose sum is σ = 21748320. Its totient is φ = 19272240.

The previous prime is 20501879. The next prime is 20501909. The reversal of 20501893 is 39810502.

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

It is a cyclic number.

It is not a de Polignac number, because 20501893 - 2⁵ = 20501861 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 (20541893) 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, 1630 + ... + 6607.

It is an arithmetic number, because the mean of its divisors is an integer number (2718540).

Almost surely, 2^20501893 is an apocalyptic number.

It is an amenable number.

20501893 is a deficient number, since it is larger than the sum of its proper divisors (1246427).

20501893 is a wasteful number, since it uses less digits than its factorization.

20501893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8387.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 20501893 is about 4527.9016111219. The cubic root of 20501893 is about 273.6936076441.

The spelling of 20501893 in words is "twenty million, five hundred one thousand, eight hundred ninety-three".