20263481 has 16 divisors (see below), whose sum is σ = 24514560. Its totient is φ = 16362000.

The previous prime is 20263459. The next prime is 20263487. The reversal of 20263481 is 18436202.

It is a cyclic number.

It is not a de Polignac number, because 20263481 - 2⁶ = 20263417 is a prime.

It is a super-2 number, since 2×20263481² = 821217324474722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20263481.

It is not an unprimeable number, because it can be changed into a prime (20263487) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33080 + ... + 33686.

It is an arithmetic number, because the mean of its divisors is an integer number (1532160).

Almost surely, 2^20263481 is an apocalyptic number.

It is an amenable number.

20263481 is a deficient number, since it is larger than the sum of its proper divisors (4251079).

20263481 is a wasteful number, since it uses less digits than its factorization.

20263481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 20263481 is about 4501.4976396750. The cubic root of 20263481 is about 272.6285609463.

Adding to 20263481 its reverse (18436202), we get a palindrome (38699683).

The spelling of 20263481 in words is "twenty million, two hundred sixty-three thousand, four hundred eighty-one".