10203550020 has 48 divisors (see below), whose sum is σ = 31744379520. Its totient is φ = 2720946528.

The previous prime is 10203550013. The next prime is 10203550033. The reversal of 10203550020 is 2005530201.

It is a happy number.

It is a super-2 number, since 2×10203550020² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 10203549975 and 10203550002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9447192 + ... + 9448271.

It is an arithmetic number, because the mean of its divisors is an integer number (661341240).

Almost surely, 2^10203550020 is an apocalyptic number.

10203550020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10203550020 is an abundant number, since it is smaller than the sum of its proper divisors (21540829500).

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

10203550020 is a wasteful number, since it uses less digits than its factorization.

10203550020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18895481 (or 18895473 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The spelling of 10203550020 in words is "ten billion, two hundred three million, five hundred fifty thousand, twenty".