19218141 has 12 divisors (see below), whose sum is σ = 28788032. Its totient is φ = 12811932.

The previous prime is 19218137. The next prime is 19218149. The reversal of 19218141 is 14181291.

It is not a de Polignac number, because 19218141 - 2² = 19218137 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19218149) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39301 + ... + 39786.

Almost surely, 2^19218141 is an apocalyptic number.

It is an amenable number.

19218141 is a deficient number, since it is larger than the sum of its proper divisors (9569891).

19218141 is an frugal number, since it uses more digits than its factorization.

19218141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79102 (or 79090 counting only the distinct ones).

The product of its digits is 576, while the sum is 27.

The square root of 19218141 is about 4383.8500202448. The cubic root of 19218141 is about 267.8574880910.

The spelling of 19218141 in words is "nineteen million, two hundred eighteen thousand, one hundred forty-one".