14623421981 has 16 divisors (see below), whose sum is σ = 17908781184. Its totient is φ = 11654905344.

The previous prime is 14623421957. The next prime is 14623421987. The reversal of 14623421981 is 18912432641.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14623421981 is a prime.

It is a super-2 number, since 2×14623421981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14623421987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 730400 + ... + 750153.

It is an arithmetic number, because the mean of its divisors is an integer number (1119298824).

Almost surely, 2^14623421981 is an apocalyptic number.

It is an amenable number.

14623421981 is a deficient number, since it is larger than the sum of its proper divisors (3285359203).

14623421981 is a wasteful number, since it uses less digits than its factorization.

14623421981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1480660.

The product of its digits is 82944, while the sum is 41.

The spelling of 14623421981 in words is "fourteen billion, six hundred twenty-three million, four hundred twenty-one thousand, nine hundred eighty-one".