20701825 has 24 divisors (see below), whose sum is σ = 26516160. Its totient is φ = 16027200.

The previous prime is 20701823. The next prime is 20701841. The reversal of 20701825 is 52810702.

It is not a de Polignac number, because 20701825 - 2¹ = 20701823 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 20701825.

It is not an unprimeable number, because it can be changed into a prime (20701823) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 189871 + ... + 189979.

It is an arithmetic number, because the mean of its divisors is an integer number (1104840).

Almost surely, 2^20701825 is an apocalyptic number.

20701825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20701825 is a deficient number, since it is larger than the sum of its proper divisors (5814335).

20701825 is a wasteful number, since it uses less digits than its factorization.

20701825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297 (or 292 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 20701825 is about 4549.9258235712. The cubic root of 20701825 is about 274.5804069455.

The spelling of 20701825 in words is "twenty million, seven hundred one thousand, eight hundred twenty-five".