19484921 has 4 divisors (see below), whose sum is σ = 19501392. Its totient is φ = 19468452.

The previous prime is 19484917. The next prime is 19484939. The reversal of 19484921 is 12948491.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12948491 = 3019 ⋅4289.

It is a cyclic number.

It is not a de Polignac number, because 19484921 - 2² = 19484917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19484951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6311 + ... + 8876.

It is an arithmetic number, because the mean of its divisors is an integer number (4875348).

Almost surely, 2^19484921 is an apocalyptic number.

It is an amenable number.

19484921 is a deficient number, since it is larger than the sum of its proper divisors (16471).

19484921 is a wasteful number, since it uses less digits than its factorization.

19484921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16470.

The product of its digits is 20736, while the sum is 38.

The square root of 19484921 is about 4414.1727424286. The cubic root of 19484921 is about 269.0912336853.

The spelling of 19484921 in words is "nineteen million, four hundred eighty-four thousand, nine hundred twenty-one".