20661483 has 4 divisors (see below), whose sum is σ = 27548648. Its totient is φ = 13774320.

The previous prime is 20661463. The next prime is 20661523. The reversal of 20661483 is 38416602.

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

It is not a de Polignac number, because 20661483 - 2⁶ = 20661419 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20661483.

It is not an unprimeable number, because it can be changed into a prime (20661463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3443578 + ... + 3443583.

It is an arithmetic number, because the mean of its divisors is an integer number (6887162).

Almost surely, 2^20661483 is an apocalyptic number.

20661483 is a deficient number, since it is larger than the sum of its proper divisors (6887165).

20661483 is an equidigital number, since it uses as much as digits as its factorization.

20661483 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6887164.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 20661483 is about 4545.4904025858. The cubic root of 20661483 is about 274.4019311191.

The spelling of 20661483 in words is "twenty million, six hundred sixty-one thousand, four hundred eighty-three".