20744625 has 64 divisors (see below), whose sum is σ = 38817792. Its totient is φ = 9752000.

The previous prime is 20744623. The next prime is 20744627. The reversal of 20744625 is 52644702.

It is an interprime number because it is at equal distance from previous prime (20744623) and next prime (20744627).

It is not a de Polignac number, because 20744625 - 2¹ = 20744623 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20744592 and 20744601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20744621) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 193822 + ... + 193928.

It is an arithmetic number, because the mean of its divisors is an integer number (606528).

Almost surely, 2^20744625 is an apocalyptic number.

20744625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20744625 is a deficient number, since it is larger than the sum of its proper divisors (18073167).

20744625 is a wasteful number, since it uses less digits than its factorization.

20744625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 30.

The square root of 20744625 is about 4554.6267684630. The cubic root of 20744625 is about 274.7695038292.

The spelling of 20744625 in words is "twenty million, seven hundred forty-four thousand, six hundred twenty-five".