19914455 has 8 divisors (see below), whose sum is σ = 26069904. Its totient is φ = 14483200.

The previous prime is 19914449. The next prime is 19914467. The reversal of 19914455 is 55441991.

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

It is a de Polignac number, because none of the positive numbers 2^k-19914455 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180986 + ... + 181095.

It is an arithmetic number, because the mean of its divisors is an integer number (3258738).

Almost surely, 2^19914455 is an apocalyptic number.

19914455 is a deficient number, since it is larger than the sum of its proper divisors (6155449).

19914455 is a wasteful number, since it uses less digits than its factorization.

19914455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362097.

The product of its digits is 32400, while the sum is 38.

The square root of 19914455 is about 4462.5614841703. The cubic root of 19914455 is about 271.0542004761.

It can be divided in two parts, 1991 and 4455, that added together give a palindrome (6446).

The spelling of 19914455 in words is "nineteen million, nine hundred fourteen thousand, four hundred fifty-five".