19906429438963 has 12 divisors (see below), whose sum is σ = 21477678060280. Its totient is φ = 18398753752320.

The previous prime is 19906429438897. The next prime is 19906429438991. The reversal of 19906429438963 is 36983492460991.

It is not a de Polignac number, because 19906429438963 - 2⁹ = 19906429438451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19906429438463) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 311600070 + ... + 311663947.

Almost surely, 2^{19906429438963} is an apocalyptic number.

19906429438963 is a deficient number, since it is larger than the sum of its proper divisors (1571248621317).

19906429438963 is an equidigital number, since it uses as much as digits as its factorization.

19906429438963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623264118 (or 623264077 counting only the distinct ones).

The product of its (nonzero) digits is 544195584, while the sum is 73.

The spelling of 19906429438963 in words is "nineteen trillion, nine hundred six billion, four hundred twenty-nine million, four hundred thirty-eight thousand, nine hundred sixty-three".