21022597673 has 8 divisors (see below), whose sum is σ = 26209992000. Its totient is φ = 16381244880.

The previous prime is 21022597637. The next prime is 21022597691. The reversal of 21022597673 is 37679522012.

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 21022597673 - 2⁸ = 21022597417 is a prime.

It is a super-2 number, since 2×21022597673² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21022597373) 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, 136510298 + ... + 136510451.

It is an arithmetic number, because the mean of its divisors is an integer number (3276249000).

Almost surely, 2^21022597673 is an apocalyptic number.

It is an amenable number.

21022597673 is a deficient number, since it is larger than the sum of its proper divisors (5187394327).

21022597673 is a wasteful number, since it uses less digits than its factorization.

21022597673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273020767.

The product of its (nonzero) digits is 317520, while the sum is 44.

The spelling of 21022597673 in words is "twenty-one billion, twenty-two million, five hundred ninety-seven thousand, six hundred seventy-three".