20245887 has 24 divisors (see below), whose sum is σ = 30990960. Its totient is φ = 12700800.

The previous prime is 20245879. The next prime is 20245891. The reversal of 20245887 is 78854202.

It is a happy number.

It is not a de Polignac number, because 20245887 - 2³ = 20245879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20245807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33387 + ... + 33987.

It is an arithmetic number, because the mean of its divisors is an integer number (1291290).

Almost surely, 2^20245887 is an apocalyptic number.

20245887 is a deficient number, since it is larger than the sum of its proper divisors (10745073).

20245887 is a wasteful number, since it uses less digits than its factorization.

20245887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823 (or 820 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 20245887 is about 4499.5429767922. The cubic root of 20245887 is about 272.5496338062.

The spelling of 20245887 in words is "twenty million, two hundred forty-five thousand, eight hundred eighty-seven".