20764625 has 32 divisors (see below), whose sum is σ = 31200000. Its totient is φ = 13478400.

The previous prime is 20764619. The next prime is 20764651. The reversal of 20764625 is 52646702.

It is not a de Polignac number, because 20764625 - 2⁸ = 20764369 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20764591 and 20764600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16001 + ... + 17249.

It is an arithmetic number, because the mean of its divisors is an integer number (975000).

Almost surely, 2^20764625 is an apocalyptic number.

20764625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20764625 is a deficient number, since it is larger than the sum of its proper divisors (10435375).

20764625 is a wasteful number, since it uses less digits than its factorization.

20764625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1290 (or 1280 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 20764625 is about 4556.8218091121. The cubic root of 20764625 is about 274.8577776990.

The spelling of 20764625 in words is "twenty million, seven hundred sixty-four thousand, six hundred twenty-five".