20732481 has 24 divisors (see below), whose sum is σ = 37337664. Its totient is φ = 10769760.

The previous prime is 20732471. The next prime is 20732483. The reversal of 20732481 is 18423702.

It is not a de Polignac number, because 20732481 - 2⁷ = 20732353 is a prime.

It is a super-2 number, since 2×20732481² = 859671536830722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20732483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14266 + ... + 15651.

It is an arithmetic number, because the mean of its divisors is an integer number (1555736).

Almost surely, 2^20732481 is an apocalyptic number.

20732481 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20732481 is a deficient number, since it is larger than the sum of its proper divisors (16605183).

20732481 is a wasteful number, since it uses less digits than its factorization.

20732481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29941 (or 29938 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 20732481 is about 4553.2934234464. The cubic root of 20732481 is about 274.7158762479.

It can be divided in two parts, 2073 and 2481, that added together give a palindrome (4554).

The spelling of 20732481 in words is "twenty million, seven hundred thirty-two thousand, four hundred eighty-one".