21076942041 has 63 divisors (see below), whose sum is σ = 33469969509. Its totient is φ = 13264714872.

The previous prime is 21076942027. The next prime is 21076942087. The reversal of 21076942041 is 14024967012.

It is a happy number.

The square root of 21076942041 is 145179.

It is a perfect power (a square), and thus also a powerful number.

It is a de Polignac number, because none of the positive numbers 2^k-21076942041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21076941987 and 21076942005.

It is not an unprimeable number, because it can be changed into a prime (21076942241) by changing a digit.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 74476686 + ... + 74476968.

Almost surely, 2^21076942041 is an apocalyptic number.

21076942041 is the 145179-th square number.

21076942041 is the 72590-th centered octagonal number.

It is an amenable number.

21076942041 is a deficient number, since it is larger than the sum of its proper divisors (12393027468).

21076942041 is an frugal number, since it uses more digits than its factorization.

21076942041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622 (or 305 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

Multiplying 21076942041 by its sum of digits (36), we get a square (758769913476 = 871074²).

The spelling of 21076942041 in words is "twenty-one billion, seventy-six million, nine hundred forty-two thousand, forty-one".