20810829100 has 36 divisors (see below), whose sum is σ = 45167201128. Its totient is φ = 8322912000.

The previous prime is 20810829049. The next prime is 20810829101. The reversal of 20810829100 is 192801802.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20810829101) 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, 727060 + ... + 755140.

Almost surely, 2^20810829100 is an apocalyptic number.

20810829100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20810829100 is an abundant number, since it is smaller than the sum of its proper divisors (24356372028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20810829100 is a wasteful number, since it uses less digits than its factorization.

20810829100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35506 (or 35499 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 31.

The spelling of 20810829100 in words is "twenty billion, eight hundred ten million, eight hundred twenty-nine thousand, one hundred".