20258011540 has 48 divisors (see below), whose sum is σ = 45826638480. Its totient is φ = 7477862400.

The previous prime is 20258011531. The next prime is 20258011559. The reversal of 20258011540 is 4511085202.

It can be written as a sum of positive squares in 8 ways, for example, as 152473104 + 20105538436 = 12348^2 + 141794^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20258011499 and 20258011508.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1240146 + ... + 1256374.

It is an arithmetic number, because the mean of its divisors is an integer number (954721635).

Almost surely, 2^20258011540 is an apocalyptic number.

20258011540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20258011540 is an abundant number, since it is smaller than the sum of its proper divisors (25568626940).

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

20258011540 is a wasteful number, since it uses less digits than its factorization.

20258011540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21052 (or 21050 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 28.

Adding to 20258011540 its reverse (4511085202), we get a palindrome (24769096742).

The spelling of 20258011540 in words is "twenty billion, two hundred fifty-eight million, eleven thousand, five hundred forty".