20287863025 has 12 divisors (see below), whose sum is σ = 25158983472. Its totient is φ = 16228978640.

The previous prime is 20287862941. The next prime is 20287863041. The reversal of 20287863025 is 52036878202.

It is not a de Polignac number, because 20287863025 - 2⁹ = 20287862513 is a prime.

It is a super-2 number, since 2×20287863025² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 389154 + ... + 438196.

It is an arithmetic number, because the mean of its divisors is an integer number (2096581956).

Almost surely, 2^20287863025 is an apocalyptic number.

20287863025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20287863025 is a deficient number, since it is larger than the sum of its proper divisors (4871120447).

20287863025 is a wasteful number, since it uses less digits than its factorization.

20287863025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65600 (or 65595 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 43.

The spelling of 20287863025 in words is "twenty billion, two hundred eighty-seven million, eight hundred sixty-three thousand, twenty-five".