21361742716 has 6 divisors (see below), whose sum is σ = 37383049760. Its totient is φ = 10680871356.

The previous prime is 21361742713. The next prime is 21361742737. The reversal of 21361742716 is 61724716312.

It is a super-3 number, since 3×21361742716³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21361742711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2670217836 + ... + 2670217843.

Almost surely, 2^21361742716 is an apocalyptic number.

It is an amenable number.

21361742716 is a deficient number, since it is larger than the sum of its proper divisors (16021307044).

21361742716 is a wasteful number, since it uses less digits than its factorization.

21361742716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5340435683 (or 5340435681 counting only the distinct ones).

The product of its digits is 84672, while the sum is 40.

The spelling of 21361742716 in words is "twenty-one billion, three hundred sixty-one million, seven hundred forty-two thousand, seven hundred sixteen".