20701625 has 32 divisors (see below), whose sum is σ = 30101760. Its totient is φ = 13920000.

The previous prime is 20701609. The next prime is 20701627. The reversal of 20701625 is 52610702.

It is not a de Polignac number, because 20701625 - 2⁴ = 20701609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20701625.

It is not an unprimeable number, because it can be changed into a prime (20701627) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51425 + ... + 51825.

It is an arithmetic number, because the mean of its divisors is an integer number (940680).

Almost surely, 2^20701625 is an apocalyptic number.

20701625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20701625 is a deficient number, since it is larger than the sum of its proper divisors (9400135).

20701625 is an equidigital number, since it uses as much as digits as its factorization.

20701625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482 (or 472 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 20701625 is about 4549.9038451378. The cubic root of 20701625 is about 274.5795227036.

The spelling of 20701625 in words is "twenty million, seven hundred one thousand, six hundred twenty-five".