21117576007 has 8 divisors (see below), whose sum is σ = 23045442192. Its totient is φ = 19191057600.

The previous prime is 21117575959. The next prime is 21117576037. The reversal of 21117576007 is 70067571112.

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

It is not a de Polignac number, because 21117576007 - 2³¹ = 18970092359 is a prime.

It is a super-2 number, since 2×21117576007² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21117576037) 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, 304038 + ... + 366979.

It is an arithmetic number, because the mean of its divisors is an integer number (2880680274).

Almost surely, 2^21117576007 is an apocalyptic number.

21117576007 is a deficient number, since it is larger than the sum of its proper divisors (1927866185).

21117576007 is a wasteful number, since it uses less digits than its factorization.

21117576007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673889.

The product of its (nonzero) digits is 20580, while the sum is 37.

The spelling of 21117576007 in words is "twenty-one billion, one hundred seventeen million, five hundred seventy-six thousand, seven".