20883481 has 4 divisors (see below), whose sum is σ = 20898000. Its totient is φ = 20868964.

The previous prime is 20883479. The next prime is 20883487. The reversal of 20883481 is 18438802.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20883481 - 2¹ = 20883479 is a prime.

It is a super-2 number, since 2×20883481² = 872239557354722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20883487) 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, 4831 + ... + 8068.

It is an arithmetic number, because the mean of its divisors is an integer number (5224500).

Almost surely, 2^20883481 is an apocalyptic number.

It is an amenable number.

20883481 is a deficient number, since it is larger than the sum of its proper divisors (14519).

20883481 is a wasteful number, since it uses less digits than its factorization.

20883481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14518.

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 20883481 is about 4569.8447457217. The cubic root of 20883481 is about 275.3812057626.

The spelling of 20883481 in words is "twenty million, eight hundred eighty-three thousand, four hundred eighty-one".