19951650533 has 2 divisors, whose sum is σ = 19951650534. Its totient is φ = 19951650532.

The previous prime is 19951650503. The next prime is 19951650557. The reversal of 19951650533 is 33505615991.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19879026049 + 72624484 = 140993^2 + 8522^2 .

It is a cyclic number.

It is not a de Polignac number, because 19951650533 - 2¹⁶ = 19951584997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19951650503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9975825266 + 9975825267.

It is an arithmetic number, because the mean of its divisors is an integer number (9975825267).

Almost surely, 2^19951650533 is an apocalyptic number.

It is an amenable number.

19951650533 is a deficient number, since it is larger than the sum of its proper divisors (1).

19951650533 is an equidigital number, since it uses as much as digits as its factorization.

19951650533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 546750, while the sum is 47.

The spelling of 19951650533 in words is "nineteen billion, nine hundred fifty-one million, six hundred fifty thousand, five hundred thirty-three".