21742113078376 has 32 divisors (see below), whose sum is σ = 41761170004680. Its totient is φ = 10605806208000.

The previous prime is 21742113078353. The next prime is 21742113078379. The reversal of 21742113078376 is 67387031124712.

It can be written as a sum of positive squares in 4 ways, for example, as 20870552664900 + 871560413476 = 4568430^2 + 933574^2 .

It is a super-2 number, since 2×21742113078376² (a number of 27 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (21742113078379) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42225676 + ... + 42737476.

Almost surely, 2^{21742113078376} is an apocalyptic number.

It is an amenable number.

21742113078376 is a deficient number, since it is larger than the sum of its proper divisors (20019056926304).

21742113078376 is a wasteful number, since it uses less digits than its factorization.

21742113078376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641365 (or 641361 counting only the distinct ones).

The product of its (nonzero) digits is 2370816, while the sum is 52.

The spelling of 21742113078376 in words is "twenty-one trillion, seven hundred forty-two billion, one hundred thirteen million, seventy-eight thousand, three hundred seventy-six".