19190400650 has 24 divisors (see below), whose sum is σ = 35697983040. Its totient is φ = 7675334960.

The previous prime is 19190400617. The next prime is 19190400661. The reversal of 19190400650 is 5600409191.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 19190400650.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 694397 + ... + 721503.

It is an arithmetic number, because the mean of its divisors is an integer number (1487415960).

Almost surely, 2^19190400650 is an apocalyptic number.

19190400650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19190400650 is a deficient number, since it is larger than the sum of its proper divisors (16507582390).

19190400650 is a wasteful number, since it uses less digits than its factorization.

19190400650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41278 (or 41273 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 35.

The spelling of 19190400650 in words is "nineteen billion, one hundred ninety million, four hundred thousand, six hundred fifty".