19451225406 has 8 divisors (see below), whose sum is σ = 38902450824. Its totient is φ = 6483741800.

The previous prime is 19451225401. The next prime is 19451225407. The reversal of 19451225406 is 60452215491.

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

19451225406 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19451225401) 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, 1620935445 + ... + 1620935456.

It is an arithmetic number, because the mean of its divisors is an integer number (4862806353).

Almost surely, 2^19451225406 is an apocalyptic number.

19451225406 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19451225406 is a wasteful number, since it uses less digits than its factorization.

19451225406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3241870906.

The product of its (nonzero) digits is 86400, while the sum is 39.

The spelling of 19451225406 in words is "nineteen billion, four hundred fifty-one million, two hundred twenty-five thousand, four hundred six".