19422491 has 8 divisors (see below), whose sum is σ = 21356544. Its totient is φ = 17516520.

The previous prime is 19422457. The next prime is 19422493.

19422491 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19422491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19422493) 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, 5555 + ... + 8348.

It is an arithmetic number, because the mean of its divisors is an integer number (2669568).

Almost surely, 2^19422491 is an apocalyptic number.

19422491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

19422491 is a deficient number, since it is larger than the sum of its proper divisors (1934053).

19422491 is a wasteful number, since it uses less digits than its factorization.

19422491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14041.

The product of its digits is 5184, while the sum is 32.

The square root of 19422491 is about 4407.0955288035. The cubic root of 19422491 is about 268.8035353238.

The spelling of 19422491 in words is "nineteen million, four hundred twenty-two thousand, four hundred ninety-one".