21476137705 has 8 divisors (see below), whose sum is σ = 28114216704. Its totient is φ = 15619009200.

The previous prime is 21476137699. The next prime is 21476137721. The reversal of 21476137705 is 50773167412.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21476137705 - 2²⁵ = 21442583273 is a prime.

It is a super-2 number, since 2×21476137705² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195237561 + ... + 195237670.

It is an arithmetic number, because the mean of its divisors is an integer number (3514277088).

Almost surely, 2^21476137705 is an apocalyptic number.

It is an amenable number.

21476137705 is a deficient number, since it is larger than the sum of its proper divisors (6638078999).

21476137705 is a wasteful number, since it uses less digits than its factorization.

21476137705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390475247.

The product of its (nonzero) digits is 246960, while the sum is 43.

The spelling of 21476137705 in words is "twenty-one billion, four hundred seventy-six million, one hundred thirty-seven thousand, seven hundred five".