20531256262 has 16 divisors (see below), whose sum is σ = 33599615184. Its totient is φ = 9331552000.

The previous prime is 20531256253. The next prime is 20531256283. The reversal of 20531256262 is 26265213502.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 256062 + ... + 326542.

It is an arithmetic number, because the mean of its divisors is an integer number (2099975949).

Almost surely, 2^20531256262 is an apocalyptic number.

20531256262 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20531256262 is a deficient number, since it is larger than the sum of its proper divisors (13068358922).

20531256262 is a wasteful number, since it uses less digits than its factorization.

20531256262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83735.

The product of its (nonzero) digits is 43200, while the sum is 34.

Adding to 20531256262 its reverse (26265213502), we get a palindrome (46796469764).

The spelling of 20531256262 in words is "twenty billion, five hundred thirty-one million, two hundred fifty-six thousand, two hundred sixty-two".