203784490020 has 48 divisors (see below), whose sum is σ = 590272320960. Its totient is φ = 52468649856.

The previous prime is 203784489959. The next prime is 203784490033. The reversal of 203784490020 is 20094487302.

It is a super-2 number, since 2×203784490020² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58557022 + ... + 58560501.

It is an arithmetic number, because the mean of its divisors is an integer number (12297340020).

Almost surely, 2^203784490020 is an apocalyptic number.

203784490020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203784490020 is an abundant number, since it is smaller than the sum of its proper divisors (386487830940).

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

203784490020 is a wasteful number, since it uses less digits than its factorization.

203784490020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117117564 (or 117117562 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 39.

The spelling of 203784490020 in words is "two hundred three billion, seven hundred eighty-four million, four hundred ninety thousand, twenty".