20425170 has 32 divisors (see below), whose sum is σ = 49222080. Its totient is φ = 5424320.

The previous prime is 20425169. The next prime is 20425189. The reversal of 20425170 is 7152402.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6805 + ... + 9335.

It is an arithmetic number, because the mean of its divisors is an integer number (1538190).

Almost surely, 2^20425170 is an apocalyptic number.

20425170 is an abundant number, since it is smaller than the sum of its proper divisors (28796910).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20425170 is a wasteful number, since it uses less digits than its factorization.

20425170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2810.

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 20425170 is about 4519.4214231470. The cubic root of 20425170 is about 273.3517718410.

Adding to 20425170 its reverse (7152402), we get a palindrome (27577572).

The spelling of 20425170 in words is "twenty million, four hundred twenty-five thousand, one hundred seventy".