21168795802 has 16 divisors (see below), whose sum is σ = 39588397632. Its totient is φ = 8247582720.

The previous prime is 21168795799. The next prime is 21168795847. The reversal of 21168795802 is 20859786112.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68729703 + ... + 68730010.

It is an arithmetic number, because the mean of its divisors is an integer number (2474274852).

Almost surely, 2^21168795802 is an apocalyptic number.

21168795802 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21168795802 is a deficient number, since it is larger than the sum of its proper divisors (18419601830).

21168795802 is a wasteful number, since it uses less digits than its factorization.

21168795802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137459733.

The product of its (nonzero) digits is 483840, while the sum is 49.

The spelling of 21168795802 in words is "twenty-one billion, one hundred sixty-eight million, seven hundred ninety-five thousand, eight hundred two".