20722661041 has 4 divisors (see below), whose sum is σ = 20724144112. Its totient is φ = 20721177972.

The previous prime is 20722661039. The next prime is 20722661107. The reversal of 20722661041 is 14016622702.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20722661041 - 2¹ = 20722661039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20722660994 and 20722661012.

It is not an unprimeable number, because it can be changed into a prime (20722667041) 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, 720375 + ... + 748588.

It is an arithmetic number, because the mean of its divisors is an integer number (5181036028).

Almost surely, 2^20722661041 is an apocalyptic number.

It is an amenable number.

20722661041 is a deficient number, since it is larger than the sum of its proper divisors (1483071).

20722661041 is a wasteful number, since it uses less digits than its factorization.

20722661041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1483070.

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

The spelling of 20722661041 in words is "twenty billion, seven hundred twenty-two million, six hundred sixty-one thousand, forty-one".