20625903 has 12 divisors (see below), whose sum is σ = 30427488. Its totient is φ = 13457760.

The previous prime is 20625893. The next prime is 20625907. The reversal of 20625903 is 30952602.

It is not a de Polignac number, because 20625903 - 2¹² = 20621807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20625907) by changing a digit.

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, 23958 + ... + 24803.

It is an arithmetic number, because the mean of its divisors is an integer number (2535624).

Almost surely, 2^20625903 is an apocalyptic number.

20625903 is a deficient number, since it is larger than the sum of its proper divisors (9801585).

20625903 is a wasteful number, since it uses less digits than its factorization.

20625903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48814 (or 48811 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 20625903 is about 4541.5749470861. The cubic root of 20625903 is about 274.2443298099.

It can be divided in two parts, 20625 and 903, that added together give a triangular number (21528 = T₂₀₇).

The spelling of 20625903 in words is "twenty million, six hundred twenty-five thousand, nine hundred three".