21199437417 has 8 divisors (see below), whose sum is σ = 28283296096. Its totient is φ = 14124268512.

The previous prime is 21199437383. The next prime is 21199437437. The reversal of 21199437417 is 71473499112.

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

It is not a de Polignac number, because 21199437417 - 2²⁸ = 20931001961 is a prime.

It is a super-2 number, since 2×21199437417² (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 (21199437437) 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, 2166748 + ... + 2176509.

It is an arithmetic number, because the mean of its divisors is an integer number (3535412012).

Almost surely, 2^21199437417 is an apocalyptic number.

It is an amenable number.

21199437417 is a deficient number, since it is larger than the sum of its proper divisors (7083858679).

21199437417 is a wasteful number, since it uses less digits than its factorization.

21199437417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4344887.

The product of its digits is 381024, while the sum is 48.

The spelling of 21199437417 in words is "twenty-one billion, one hundred ninety-nine million, four hundred thirty-seven thousand, four hundred seventeen".