20172010782 has 64 divisors (see below), whose sum is σ = 52946380800. Its totient is φ = 4963718880.

The previous prime is 20172010777. The next prime is 20172010787. The reversal of 20172010782 is 28701027102.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20172010777) and next prime (20172010787).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20172010787) 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 31 ways as a sum of consecutive naturals, for example, 1140232 + ... + 1157787.

It is an arithmetic number, because the mean of its divisors is an integer number (827287200).

Almost surely, 2^20172010782 is an apocalyptic number.

20172010782 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20172010782 is an abundant number, since it is smaller than the sum of its proper divisors (32774370018).

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

20172010782 is a wasteful number, since it uses less digits than its factorization.

20172010782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2298061.

The product of its (nonzero) digits is 3136, while the sum is 30.

Adding to 20172010782 its reverse (28701027102), we get a palindrome (48873037884).

The spelling of 20172010782 in words is "twenty billion, one hundred seventy-two million, ten thousand, seven hundred eighty-two".