19620916929 has 32 divisors (see below), whose sum is σ = 29419223040. Its totient is φ = 12923318016.

The previous prime is 19620916883. The next prime is 19620916933. The reversal of 19620916929 is 92961902691.

19620916929 is a `hidden beast` number, since 1 + 9 + 620 + 9 + 1 + 6 + 9 + 2 + 9 = 666.

It is not a de Polignac number, because 19620916929 - 2⁷ = 19620916801 is a prime.

It is a super-2 number, since 2×19620916929² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19620916999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 957024 + ... + 977310.

It is an arithmetic number, because the mean of its divisors is an integer number (919350720).

Almost surely, 2^19620916929 is an apocalyptic number.

It is an amenable number.

19620916929 is a deficient number, since it is larger than the sum of its proper divisors (9798306111).

19620916929 is a wasteful number, since it uses less digits than its factorization.

19620916929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20726 (or 20720 counting only the distinct ones).

The product of its (nonzero) digits is 944784, while the sum is 54.

The spelling of 19620916929 in words is "nineteen billion, six hundred twenty million, nine hundred sixteen thousand, nine hundred twenty-nine".