19873227136 has 48 divisors (see below), whose sum is σ = 46055077740. Its totient is φ = 8517094656.

The previous prime is 19873227131. The next prime is 19873227151. The reversal of 19873227136 is 63172237891.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a self number, because there is not a number n which added to its sum of digits gives 19873227136.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19873227131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1578010 + ... + 1590553.

Almost surely, 2^19873227136 is an apocalyptic number.

19873227136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19873227136 is an abundant number, since it is smaller than the sum of its proper divisors (26181850604).

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

19873227136 is an equidigital number, since it uses as much as digits as its factorization.

19873227136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3168591 (or 3168572 counting only the distinct ones).

The product of its digits is 762048, while the sum is 49.

It can be divided in two parts, 19873 and 227136, that added together give a square (247009 = 497²).

The spelling of 19873227136 in words is "nineteen billion, eight hundred seventy-three million, two hundred twenty-seven thousand, one hundred thirty-six".