20983546 has 4 divisors (see below), whose sum is σ = 31475322. Its totient is φ = 10491772.

The previous prime is 20983541. The next prime is 20983561. The reversal of 20983546 is 64538902.

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

It can be written as a sum of positive squares in only one way, i.e., 14907321 + 6076225 = 3861^2 + 2465^2 .

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (20983541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5245885 + ... + 5245888.

Almost surely, 2^20983546 is an apocalyptic number.

20983546 is a deficient number, since it is larger than the sum of its proper divisors (10491776).

20983546 is a wasteful number, since it uses less digits than its factorization.

20983546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10491775.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 20983546 is about 4580.7800645742. The cubic root of 20983546 is about 275.8203427180.

The spelling of 20983546 in words is "twenty million, nine hundred eighty-three thousand, five hundred forty-six".