20203554100 has 36 divisors (see below), whose sum is σ = 44459216928. Its totient is φ = 7967596000.

The previous prime is 20203554079. The next prime is 20203554101. The reversal of 20203554100 is 145530202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20203554101) 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, 1415686 + ... + 1429885.

It is an arithmetic number, because the mean of its divisors is an integer number (1234978248).

Almost surely, 2^20203554100 is an apocalyptic number.

20203554100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20203554100 is an abundant number, since it is smaller than the sum of its proper divisors (24255662828).

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

20203554100 is a wasteful number, since it uses less digits than its factorization.

20203554100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2845656 (or 2845649 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The spelling of 20203554100 in words is "twenty billion, two hundred three million, five hundred fifty-four thousand, one hundred".