2021903725 has 12 divisors (see below), whose sum is σ = 2568312180. Its totient is φ = 1578070400.

The previous prime is 2021903713. The next prime is 2021903773. The reversal of 2021903725 is 5273091202.

It can be written as a sum of positive squares in 6 ways, for example, as 766902249 + 1255001476 = 27693^2 + 35426^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2021903725 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 985270 + ... + 987319.

It is an arithmetic number, because the mean of its divisors is an integer number (214026015).

Almost surely, 2^2021903725 is an apocalyptic number.

2021903725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2021903725 is a deficient number, since it is larger than the sum of its proper divisors (546408455).

2021903725 is a wasteful number, since it uses less digits than its factorization.

2021903725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1972640 (or 1972635 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 2021903725 is about 44965.5837836005. The cubic root of 2021903725 is about 1264.5038543419.

Adding to 2021903725 its reverse (5273091202), we get a palindrome (7294994927).

The spelling of 2021903725 in words is "two billion, twenty-one million, nine hundred three thousand, seven hundred twenty-five".