19029926650 has 72 divisors (see below), whose sum is σ = 43596675036. Its totient is φ = 6140736000.

The previous prime is 19029926627. The next prime is 19029926651. The reversal of 19029926650 is 5662992091.

It can be written as a sum of positive squares in 6 ways, for example, as 9737545041 + 9292381609 = 98679^2 + 96397^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 19029926594 and 19029926603.

It is not an unprimeable number, because it can be changed into a prime (19029926651) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 186801 + ... + 270100.

Almost surely, 2^19029926650 is an apocalyptic number.

19029926650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19029926650 is an abundant number, since it is smaller than the sum of its proper divisors (24566748386).

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

19029926650 is a wasteful number, since it uses less digits than its factorization.

19029926650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456944 (or 456932 counting only the distinct ones).

The product of its (nonzero) digits is 524880, while the sum is 49.

Subtracting from 19029926650 its sum of digits (49), we obtain a square (19029926601 = 137949²).

The spelling of 19029926650 in words is "nineteen billion, twenty-nine million, nine hundred twenty-six thousand, six hundred fifty".