20531443460 has 48 divisors (see below), whose sum is σ = 47698180992. Its totient is φ = 7360819200.

The previous prime is 20531443459. The next prime is 20531443463. The reversal of 20531443460 is 6434413502.

It is a super-3 number, since 3×20531443460³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (20531443463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 641597 + ... + 672836.

It is an arithmetic number, because the mean of its divisors is an integer number (993712104).

Almost surely, 2^20531443460 is an apocalyptic number.

20531443460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20531443460 is an abundant number, since it is smaller than the sum of its proper divisors (27166737532).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20531443460 is a wasteful number, since it uses less digits than its factorization.

20531443460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1314524 (or 1314522 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 32.

Adding to 20531443460 its reverse (6434413502), we get a palindrome (26965856962).

The spelling of 20531443460 in words is "twenty billion, five hundred thirty-one million, four hundred forty-three thousand, four hundred sixty".