21076497708 has 24 divisors (see below), whose sum is σ = 56203994112. Its totient is φ = 6021856464.

The previous prime is 21076497703. The next prime is 21076497733. The reversal of 21076497708 is 80779467012.

It is not an unprimeable number, because it can be changed into a prime (21076497703) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125455260 + ... + 125455427.

It is an arithmetic number, because the mean of its divisors is an integer number (2341833088).

Almost surely, 2^21076497708 is an apocalyptic number.

21076497708 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21076497708 is an abundant number, since it is smaller than the sum of its proper divisors (35127496404).

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

21076497708 is a wasteful number, since it uses less digits than its factorization.

21076497708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250910701 (or 250910699 counting only the distinct ones).

The product of its (nonzero) digits is 1185408, while the sum is 51.

It can be divided in two parts, 2107 and 6497708, that added together give a triangular number (6499815 = T₃₆₀₅).

The spelling of 21076497708 in words is "twenty-one billion, seventy-six million, four hundred ninety-seven thousand, seven hundred eight".