21061034774 has 16 divisors (see below), whose sum is σ = 34027235088. Its totient is φ = 9718888032.

The previous prime is 21061034741. The next prime is 21061034777. The reversal of 21061034774 is 47743016012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21061034777) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 104084 + ... + 230120.

It is an arithmetic number, because the mean of its divisors is an integer number (2126702193).

Almost surely, 2^21061034774 is an apocalyptic number.

21061034774 is a deficient number, since it is larger than the sum of its proper divisors (12966200314).

21061034774 is a wasteful number, since it uses less digits than its factorization.

21061034774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132479.

The product of its (nonzero) digits is 28224, while the sum is 35.

The spelling of 21061034774 in words is "twenty-one billion, sixty-one million, thirty-four thousand, seven hundred seventy-four".