19753950551 has 2 divisors, whose sum is σ = 19753950552. Its totient is φ = 19753950550.

The previous prime is 19753950527. The next prime is 19753950583. The reversal of 19753950551 is 15505935791.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19753950551 - 2⁶ = 19753950487 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19753950551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19753950521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9876975275 + 9876975276.

It is an arithmetic number, because the mean of its divisors is an integer number (9876975276).

Almost surely, 2^19753950551 is an apocalyptic number.

19753950551 is a deficient number, since it is larger than the sum of its proper divisors (1).

19753950551 is an equidigital number, since it uses as much as digits as its factorization.

19753950551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1063125, while the sum is 50.

The spelling of 19753950551 in words is "nineteen billion, seven hundred fifty-three million, nine hundred fifty thousand, five hundred fifty-one".