20357378829 has 12 divisors (see below), whose sum is σ = 30952740000. Its totient is φ = 12857291784.

The previous prime is 20357378803. The next prime is 20357378851. The reversal of 20357378829 is 92887375302.

It is a de Polignac number, because none of the positive numbers 2^k-20357378829 is a prime.

It is a super-2 number, since 2×20357378829² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20357378869) 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 11 ways as a sum of consecutive naturals, for example, 59524329 + ... + 59524670.

It is an arithmetic number, because the mean of its divisors is an integer number (2579395000).

Almost surely, 2^20357378829 is an apocalyptic number.

It is an amenable number.

20357378829 is a deficient number, since it is larger than the sum of its proper divisors (10595361171).

20357378829 is a wasteful number, since it uses less digits than its factorization.

20357378829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119049024 (or 119049021 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 54.

The spelling of 20357378829 in words is "twenty billion, three hundred fifty-seven million, three hundred seventy-eight thousand, eight hundred twenty-nine".