19015421936 has 40 divisors (see below), whose sum is σ = 42682384224. Its totient is φ = 8037826560.

The previous prime is 19015421923. The next prime is 19015421947. The reversal of 19015421936 is 63912451091.

It is a junction number, because it is equal to n+sod(n) for n = 19015421893 and 19015421902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1154705 + ... + 1171056.

Almost surely, 2^19015421936 is an apocalyptic number.

19015421936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19015421936 is an abundant number, since it is smaller than the sum of its proper divisors (23666962288).

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

19015421936 is a wasteful number, since it uses less digits than its factorization.

19015421936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2325849 (or 2325843 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 41.

The spelling of 19015421936 in words is "nineteen billion, fifteen million, four hundred twenty-one thousand, nine hundred thirty-six".