20746425 has 48 divisors (see below), whose sum is σ = 40156160. Its totient is φ = 9253440.

The previous prime is 20746421. The next prime is 20746441. The reversal of 20746425 is 52464702.

It is not a de Polignac number, because 20746425 - 2² = 20746421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20746392 and 20746401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20746421) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22116 + ... + 23034.

Almost surely, 2^20746425 is an apocalyptic number.

20746425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20746425 is a deficient number, since it is larger than the sum of its proper divisors (19409735).

20746425 is a wasteful number, since it uses less digits than its factorization.

20746425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 982 (or 977 counting only the distinct ones).

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

The square root of 20746425 is about 4554.8243654394. The cubic root of 20746425 is about 274.7774508002. Note that the first 3 decimals are identical.

The spelling of 20746425 in words is "twenty million, seven hundred forty-six thousand, four hundred twenty-five".