20803172229 has 24 divisors (see below), whose sum is σ = 35140394432. Its totient is φ = 11611071360.

The previous prime is 20803172209. The next prime is 20803172237. The reversal of 20803172229 is 92227130802.

It is not a de Polignac number, because 20803172229 - 2⁸ = 20803171973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20803172193 and 20803172202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20803172209) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3836932 + ... + 3842349.

Almost surely, 2^20803172229 is an apocalyptic number.

It is an amenable number.

20803172229 is a deficient number, since it is larger than the sum of its proper divisors (14337222203).

20803172229 is a wasteful number, since it uses less digits than its factorization.

20803172229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7679337 (or 7679334 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The spelling of 20803172229 in words is "twenty billion, eight hundred three million, one hundred seventy-two thousand, two hundred twenty-nine".