19121679406 has 4 divisors (see below), whose sum is σ = 28682519112. Its totient is φ = 9560839702.

The previous prime is 19121679391. The next prime is 19121679413. The reversal of 19121679406 is 60497612191.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4780419850 + ... + 4780419853.

It is an arithmetic number, because the mean of its divisors is an integer number (7170629778).

Almost surely, 2^19121679406 is an apocalyptic number.

19121679406 is a deficient number, since it is larger than the sum of its proper divisors (9560839706).

19121679406 is an equidigital number, since it uses as much as digits as its factorization.

19121679406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9560839705.

The product of its (nonzero) digits is 163296, while the sum is 46.

The spelling of 19121679406 in words is "nineteen billion, one hundred twenty-one million, six hundred seventy-nine thousand, four hundred six".