20025828 has 18 divisors (see below), whose sum is σ = 50620934. Its totient is φ = 6675264.

The previous prime is 20025823. The next prime is 20025833. The reversal of 20025828 is 82852002.

It is an interprime number because it is at equal distance from previous prime (20025823) and next prime (20025833).

It can be written as a sum of positive squares in only one way, i.e., 19289664 + 736164 = 4392^2 + 858^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (20025823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 278101 + ... + 278172.

Almost surely, 2^20025828 is an apocalyptic number.

It is an amenable number.

20025828 is an abundant number, since it is smaller than the sum of its proper divisors (30595106).

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

20025828 is a wasteful number, since it uses less digits than its factorization.

20025828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556283 (or 556278 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 20025828 is about 4475.0226815068. The cubic root of 20025828 is about 271.5585580273.

The spelling of 20025828 in words is "twenty million, twenty-five thousand, eight hundred twenty-eight".