203427135920 has 40 divisors (see below), whose sum is σ = 472993320240. Its totient is φ = 81366513920.

The previous prime is 203427135893. The next prime is 203427136007. The reversal of 203427135920 is 29531724302.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×203427135920² (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 7 ways as a sum of consecutive naturals, for example, 1740935 + ... + 1854105.

It is an arithmetic number, because the mean of its divisors is an integer number (11824833006).

Almost surely, 2^203427135920 is an apocalyptic number.

203427135920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203427135920 is an abundant number, since it is smaller than the sum of its proper divisors (269566184320).

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

203427135920 is a wasteful number, since it uses less digits than its factorization.

203427135920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135653 (or 135647 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 38.

The spelling of 203427135920 in words is "two hundred three billion, four hundred twenty-seven million, one hundred thirty-five thousand, nine hundred twenty".