203380721842 has 16 divisors (see below), whose sum is σ = 329806578240. Its totient is φ = 93734499888.

The previous prime is 203380721837. The next prime is 203380721897. The reversal of 203380721842 is 248127083302.

It is a junction number, because it is equal to n+sod(n) for n = 203380721795 and 203380721804.

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, 72324598 + ... + 72327409.

It is an arithmetic number, because the mean of its divisors is an integer number (20612911140).

Almost surely, 2^203380721842 is an apocalyptic number.

203380721842 is a deficient number, since it is larger than the sum of its proper divisors (126425856398).

203380721842 is a wasteful number, since it uses less digits than its factorization.

203380721842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144652065.

The product of its (nonzero) digits is 129024, while the sum is 40.

The spelling of 203380721842 in words is "two hundred three billion, three hundred eighty million, seven hundred twenty-one thousand, eight hundred forty-two".