19409950651 has 36 divisors (see below), whose sum is σ = 25516960752. Its totient is φ = 14453697024.

The previous prime is 19409950649. The next prime is 19409950673. The reversal of 19409950651 is 15605990491.

It is not a de Polignac number, because 19409950651 - 2¹ = 19409950649 is a prime.

It is a super-3 number, since 3×19409950651³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19409950595 and 19409950604.

It is not an unprimeable number, because it can be changed into a prime (19409950151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 313501 + ... + 370273.

Almost surely, 2^19409950651 is an apocalyptic number.

19409950651 is a deficient number, since it is larger than the sum of its proper divisors (6107010101).

19409950651 is a wasteful number, since it uses less digits than its factorization.

19409950651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56840 (or 56810 counting only the distinct ones).

The product of its (nonzero) digits is 437400, while the sum is 49.

The spelling of 19409950651 in words is "nineteen billion, four hundred nine million, nine hundred fifty thousand, six hundred fifty-one".