20450983 has 12 divisors (see below), whose sum is σ = 25190352. Its totient is φ = 16497600.

The previous prime is 20450981. The next prime is 20450999. The reversal of 20450983 is 38905402.

It is not a de Polignac number, because 20450983 - 2¹ = 20450981 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 (20450981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11443 + ... + 13108.

It is an arithmetic number, because the mean of its divisors is an integer number (2099196).

Almost surely, 2^20450983 is an apocalyptic number.

20450983 is a deficient number, since it is larger than the sum of its proper divisors (4739369).

20450983 is a wasteful number, since it uses less digits than its factorization.

20450983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24582 (or 24575 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 20450983 is about 4522.2763073479. The cubic root of 20450983 is about 273.4668758840.

The spelling of 20450983 in words is "twenty million, four hundred fifty thousand, nine hundred eighty-three".