20461625 has 16 divisors (see below), whose sum is σ = 27041040. Its totient is φ = 15404800.

The previous prime is 20461619. The next prime is 20461631. The reversal of 20461625 is 52616402.

20461625 is nontrivially palindromic in base 2.

It is an interprime number because it is at equal distance from previous prime (20461619) and next prime (20461631).

It can be written as a sum of positive squares in 8 ways, for example, as 274576 + 20187049 = 524^2 + 4493^2 .

It is not a de Polignac number, because 20461625 - 2¹⁴ = 20445241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20461594 and 20461603.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2690 + ... + 6939.

It is an arithmetic number, because the mean of its divisors is an integer number (1690065).

Almost surely, 2^20461625 is an apocalyptic number.

20461625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20461625 is a deficient number, since it is larger than the sum of its proper divisors (6579415).

20461625 is an equidigital number, since it uses as much as digits as its factorization.

20461625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9661 (or 9651 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 20461625 is about 4523.4527741538. The cubic root of 20461625 is about 273.5143019636.

The spelling of 20461625 in words is "twenty million, four hundred sixty-one thousand, six hundred twenty-five".