203339890021 has 4 divisors (see below), whose sum is σ = 209899241344. Its totient is φ = 196780538700.

The previous prime is 203339890007. The next prime is 203339890027. The reversal of 203339890021 is 120098933302.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203339890021 is a prime.

It is a super-2 number, since 2×203339890021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203339890027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3279675615 + ... + 3279675676.

It is an arithmetic number, because the mean of its divisors is an integer number (52474810336).

Almost surely, 2^203339890021 is an apocalyptic number.

It is an amenable number.

203339890021 is a deficient number, since it is larger than the sum of its proper divisors (6559351323).

203339890021 is an equidigital number, since it uses as much as digits as its factorization.

203339890021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6559351322.

The product of its (nonzero) digits is 69984, while the sum is 40.

The spelling of 203339890021 in words is "two hundred three billion, three hundred thirty-nine million, eight hundred ninety thousand, twenty-one".