21100004507 has 8 divisors (see below), whose sum is σ = 22414299600. Its totient is φ = 19806086304.

The previous prime is 21100004483. The next prime is 21100004543. The reversal of 21100004507 is 70540000112.

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

It is a cyclic number.

It is not a de Polignac number, because 21100004507 - 2²⁰ = 21098955931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21100004557) 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, 5092088 + ... + 5096229.

It is an arithmetic number, because the mean of its divisors is an integer number (2801787450).

Almost surely, 2^21100004507 is an apocalyptic number.

21100004507 is a deficient number, since it is larger than the sum of its proper divisors (1314295093).

21100004507 is a wasteful number, since it uses less digits than its factorization.

21100004507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10188445.

The product of its (nonzero) digits is 280, while the sum is 20.

Adding to 21100004507 its reverse (70540000112), we get a palindrome (91640004619).

The spelling of 21100004507 in words is "twenty-one billion, one hundred million, four thousand, five hundred seven".