19023121 has 8 divisors (see below), whose sum is σ = 20746880. Its totient is φ = 17336592.

The previous prime is 19023107. The next prime is 19023149. The reversal of 19023121 is 12132091.

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

It is not a de Polignac number, because 19023121 - 2⁵ = 19023089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19023421) 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, 8235 + ... + 10288.

It is an arithmetic number, because the mean of its divisors is an integer number (2593360).

Almost surely, 2^19023121 is an apocalyptic number.

It is an amenable number.

19023121 is a deficient number, since it is larger than the sum of its proper divisors (1723759).

19023121 is a wasteful number, since it uses less digits than its factorization.

19023121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18615.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 19023121 is about 4361.5502977726. The cubic root of 19023121 is about 266.9483597942.

The spelling of 19023121 in words is "nineteen million, twenty-three thousand, one hundred twenty-one".