19480661 has 4 divisors (see below), whose sum is σ = 19609824. Its totient is φ = 19351500.

The previous prime is 19480649. The next prime is 19480667. The reversal of 19480661 is 16608491.

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.

It is a cyclic number.

It is not a de Polignac number, because 19480661 - 2⁶ = 19480597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19480667) 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, 64355 + ... + 64656.

It is an arithmetic number, because the mean of its divisors is an integer number (4902456).

Almost surely, 2^19480661 is an apocalyptic number.

It is an amenable number.

19480661 is a deficient number, since it is larger than the sum of its proper divisors (129163).

19480661 is a wasteful number, since it uses less digits than its factorization.

19480661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129162.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 19480661 is about 4413.6901794304. The cubic root of 19480661 is about 269.0716217299.

The spelling of 19480661 in words is "nineteen million, four hundred eighty thousand, six hundred sixty-one".