20523242015 has 16 divisors (see below), whose sum is σ = 25801789440. Its totient is φ = 15651804960.

The previous prime is 20523241933. The next prime is 20523242023. The reversal of 20523242015 is 51024232502.

It is a de Polignac number, because none of the positive numbers 2^k-20523242015 is a prime.

It is a super-3 number, since 3×20523242015³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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, 977735 + ... + 998504.

It is an arithmetic number, because the mean of its divisors is an integer number (1612611840).

Almost surely, 2^20523242015 is an apocalyptic number.

20523242015 is a deficient number, since it is larger than the sum of its proper divisors (5278547425).

20523242015 is a wasteful number, since it uses less digits than its factorization.

20523242015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1976342.

The product of its (nonzero) digits is 4800, while the sum is 26.

Adding to 20523242015 its reverse (51024232502), we get a palindrome (71547474517).

The spelling of 20523242015 in words is "twenty billion, five hundred twenty-three million, two hundred forty-two thousand, fifteen".