19510232072 has 8 divisors (see below), whose sum is σ = 36581685150. Its totient is φ = 9755116032.

The previous prime is 19510232047. The next prime is 19510232081. The reversal of 19510232072 is 27023201591.

It can be written as a sum of positive squares in only one way, i.e., 11682583396 + 7827648676 = 108086^2 + 88474^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1219389497 + ... + 1219389512.

Almost surely, 2^19510232072 is an apocalyptic number.

It is an amenable number.

19510232072 is a deficient number, since it is larger than the sum of its proper divisors (17071453078).

19510232072 is a wasteful number, since it uses less digits than its factorization.

19510232072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2438779015 (or 2438779011 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 32.

The spelling of 19510232072 in words is "nineteen billion, five hundred ten million, two hundred thirty-two thousand, seventy-two".