19066862421 has 12 divisors (see below), whose sum is σ = 27679423200. Its totient is φ = 12647364840.

The previous prime is 19066862359. The next prime is 19066862429. The reversal of 19066862421 is 12426866091.

19066862421 is a `hidden beast` number, since 1 + 90 + 66 + 86 + 2 + 421 = 666.

It is not a de Polignac number, because 19066862421 - 2²² = 19062668117 is a prime.

It is a super-3 number, since 3×19066862421³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19066862429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5321175 + ... + 5324756.

It is an arithmetic number, because the mean of its divisors is an integer number (2306618600).

Almost surely, 2^19066862421 is an apocalyptic number.

It is an amenable number.

19066862421 is a deficient number, since it is larger than the sum of its proper divisors (8612560779).

19066862421 is a wasteful number, since it uses less digits than its factorization.

19066862421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10646136 (or 10646133 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The spelling of 19066862421 in words is "nineteen billion, sixty-six million, eight hundred sixty-two thousand, four hundred twenty-one".