10820781012 has 96 divisors (see below), whose sum is σ = 26745384960. Its totient is φ = 3400266240.

The previous prime is 10820780989. The next prime is 10820781019. The reversal of 10820781012 is 21018702801.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10820781019) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2477943 + ... + 2482305.

It is an arithmetic number, because the mean of its divisors is an integer number (278597760).

Almost surely, 2^10820781012 is an apocalyptic number.

10820781012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

10820781012 is an abundant number, since it is smaller than the sum of its proper divisors (15924603948).

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

10820781012 is a wasteful number, since it uses less digits than its factorization.

10820781012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4573 (or 4571 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 30.

The spelling of 10820781012 in words is "ten billion, eight hundred twenty million, seven hundred eighty-one thousand, twelve".