20770625 has 20 divisors (see below), whose sum is σ = 26241600. Its totient is φ = 16434000.

The previous prime is 20770619. The next prime is 20770637. The reversal of 20770625 is 52607702.

It is a happy number.

It is not a de Polignac number, because 20770625 - 2⁴ = 20770609 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 104276 + ... + 104474.

It is an arithmetic number, because the mean of its divisors is an integer number (1312080).

Almost surely, 2^20770625 is an apocalyptic number.

20770625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20770625 is a deficient number, since it is larger than the sum of its proper divisors (5470975).

20770625 is an equidigital number, since it uses as much as digits as its factorization.

20770625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386 (or 371 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 20770625 is about 4557.4801151514. The cubic root of 20770625 is about 274.8842488063.

The spelling of 20770625 in words is "twenty million, seven hundred seventy thousand, six hundred twenty-five".