19428179623 has 2 divisors, whose sum is σ = 19428179624. Its totient is φ = 19428179622.

The previous prime is 19428179621. The next prime is 19428179647. The reversal of 19428179623 is 32697182491.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19428179623 - 2¹ = 19428179621 is a prime.

Together with 19428179621, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19428179621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9714089811 + 9714089812.

It is an arithmetic number, because the mean of its divisors is an integer number (9714089812).

Almost surely, 2^19428179623 is an apocalyptic number.

19428179623 is a deficient number, since it is larger than the sum of its proper divisors (1).

19428179623 is an equidigital number, since it uses as much as digits as its factorization.

19428179623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 52.

The spelling of 19428179623 in words is "nineteen billion, four hundred twenty-eight million, one hundred seventy-nine thousand, six hundred twenty-three".