21907421701 has 8 divisors (see below), whose sum is σ = 24022836864. Its totient is φ = 19812645120.

The previous prime is 21907421647. The next prime is 21907421707. The reversal of 21907421701 is 10712470912.

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 21907421701 - 2³³ = 13317487109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21907421707) 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, 5157421 + ... + 5161666.

It is an arithmetic number, because the mean of its divisors is an integer number (3002854608).

Almost surely, 2^21907421701 is an apocalyptic number.

It is an amenable number.

21907421701 is a deficient number, since it is larger than the sum of its proper divisors (2115415163).

21907421701 is a wasteful number, since it uses less digits than its factorization.

21907421701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10319291.

The product of its (nonzero) digits is 7056, while the sum is 34.

The spelling of 21907421701 in words is "twenty-one billion, nine hundred seven million, four hundred twenty-one thousand, seven hundred one".