19400007124 has 6 divisors (see below), whose sum is σ = 33950012474. Its totient is φ = 9700003560.

The previous prime is 19400007119. The next prime is 19400007131. The reversal of 19400007124 is 42170000491.

It can be written as a sum of positive squares in only one way, i.e., 16687472400 + 2712534724 = 129180^2 + 52082^2 .

It is a super-2 number, since 2×19400007124² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19400007092 and 19400007101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2425000887 + ... + 2425000894.

Almost surely, 2^19400007124 is an apocalyptic number.

It is an amenable number.

19400007124 is a deficient number, since it is larger than the sum of its proper divisors (14550005350).

19400007124 is a wasteful number, since it uses less digits than its factorization.

19400007124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4850001785 (or 4850001783 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The spelling of 19400007124 in words is "nineteen billion, four hundred million, seven thousand, one hundred twenty-four".