21914118709 has 8 divisors (see below), whose sum is σ = 25074564480. Its totient is φ = 18761137296.

The previous prime is 21914118697. The next prime is 21914118731. The reversal of 21914118709 is 90781141912.

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 21914118709 - 2¹⁹ = 21913594421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21914118739) 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, 1859794 + ... + 1871539.

It is an arithmetic number, because the mean of its divisors is an integer number (3134320560).

Almost surely, 2^21914118709 is an apocalyptic number.

It is an amenable number.

21914118709 is a deficient number, since it is larger than the sum of its proper divisors (3160445771).

21914118709 is an equidigital number, since it uses as much as digits as its factorization.

21914118709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3732179.

The product of its (nonzero) digits is 36288, while the sum is 43.

It can be divided in two parts, 2191 and 4118709, that added together give a square (4120900 = 2030²).

The spelling of 21914118709 in words is "twenty-one billion, nine hundred fourteen million, one hundred eighteen thousand, seven hundred nine".