19148572221 has 8 divisors (see below), whose sum is σ = 25535979840. Its totient is φ = 12763439712.

The previous prime is 19148572141. The next prime is 19148572243. The reversal of 19148572221 is 12227584191.

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

It is not a de Polignac number, because 19148572221 - 2⁹ = 19148571709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19148573221) 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, 549040 + ... + 582873.

It is an arithmetic number, because the mean of its divisors is an integer number (3191997480).

Almost surely, 2^19148572221 is an apocalyptic number.

It is an amenable number.

19148572221 is a deficient number, since it is larger than the sum of its proper divisors (6387407619).

19148572221 is a wasteful number, since it uses less digits than its factorization.

19148572221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1137555.

The product of its digits is 80640, while the sum is 42.

The spelling of 19148572221 in words is "nineteen billion, one hundred forty-eight million, five hundred seventy-two thousand, two hundred twenty-one".