21077351796 has 48 divisors (see below), whose sum is σ = 50353318400. Its totient is φ = 6858425952.

The previous prime is 21077351767. The next prime is 21077351803. The reversal of 21077351796 is 69715377012.

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, 958695 + ... + 980433.

Almost surely, 2^21077351796 is an apocalyptic number.

It is an amenable number.

21077351796 is an abundant number, since it is smaller than the sum of its proper divisors (29275966604).

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

21077351796 is a wasteful number, since it uses less digits than its factorization.

21077351796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23668 (or 23666 counting only the distinct ones).

The product of its (nonzero) digits is 555660, while the sum is 48.

The spelling of 21077351796 in words is "twenty-one billion, seventy-seven million, three hundred fifty-one thousand, seven hundred ninety-six".