21180352314794 has 16 divisors (see below), whose sum is σ = 31984736004000. Its totient is φ = 10518823636464.

The previous prime is 21180352314767. The next prime is 21180352314799. The reversal of 21180352314794 is 49741325308112.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21180352314799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11648504 + ... + 13343475.

It is an arithmetic number, because the mean of its divisors is an integer number (1999046000250).

Almost surely, 2^{21180352314794} is an apocalyptic number.

21180352314794 is a deficient number, since it is larger than the sum of its proper divisors (10804383689206).

21180352314794 is a wasteful number, since it uses less digits than its factorization.

21180352314794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24994837.

The product of its (nonzero) digits is 1451520, while the sum is 50.

The spelling of 21180352314794 in words is "twenty-one trillion, one hundred eighty billion, three hundred fifty-two million, three hundred fourteen thousand, seven hundred ninety-four".