20025250728 has 64 divisors (see below), whose sum is σ = 57626688000. Its totient is φ = 5680331712.

The previous prime is 20025250703. The next prime is 20025250753. The reversal of 20025250728 is 82705252002.

It is an interprime number because it is at equal distance from previous prime (20025250703) and next prime (20025250753).

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, 405418 + ... + 452121.

It is an arithmetic number, because the mean of its divisors is an integer number (900417000).

Almost surely, 2^20025250728 is an apocalyptic number.

20025250728 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20025250728 is an abundant number, since it is smaller than the sum of its proper divisors (37601437272).

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

20025250728 is a wasteful number, since it uses less digits than its factorization.

20025250728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857694 (or 857690 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 33.

The spelling of 20025250728 in words is "twenty billion, twenty-five million, two hundred fifty thousand, seven hundred twenty-eight".