21361742410 has 8 divisors (see below), whose sum is σ = 38451136356. Its totient is φ = 8544696960.

The previous prime is 21361742359. The next prime is 21361742417. The reversal of 21361742410 is 1424716312.

It can be written as a sum of positive squares in 2 ways, for example, as 21334399969 + 27342441 = 146063^2 + 5229^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21361742417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1068087111 + ... + 1068087130.

Almost surely, 2^21361742410 is an apocalyptic number.

21361742410 is a deficient number, since it is larger than the sum of its proper divisors (17089393946).

21361742410 is a wasteful number, since it uses less digits than its factorization.

21361742410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2136174248.

The product of its (nonzero) digits is 8064, while the sum is 31.

The spelling of 21361742410 in words is "twenty-one billion, three hundred sixty-one million, seven hundred forty-two thousand, four hundred ten".