21790341471 has 16 divisors (see below), whose sum is σ = 29994946560. Its totient is φ = 14056438560.

The previous prime is 21790341467. The next prime is 21790341491. The reversal of 21790341471 is 17414309712.

It is not a de Polignac number, because 21790341471 - 2² = 21790341467 is a prime.

It is a super-3 number, since 3×21790341471³ (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 (21790341451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1277626 + ... + 1294568.

It is an arithmetic number, because the mean of its divisors is an integer number (1874684160).

Almost surely, 2^21790341471 is an apocalyptic number.

21790341471 is a deficient number, since it is larger than the sum of its proper divisors (8204605089).

21790341471 is a wasteful number, since it uses less digits than its factorization.

21790341471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30806.

The product of its (nonzero) digits is 42336, while the sum is 39.

The spelling of 21790341471 in words is "twenty-one billion, seven hundred ninety million, three hundred forty-one thousand, four hundred seventy-one".