20425665900 has 72 divisors (see below), whose sum is σ = 59117872464. Its totient is φ = 5445036800.

The previous prime is 20425665899. The next prime is 20425665901. The reversal of 20425665900 is 956652402.

It is an interprime number because it is at equal distance from previous prime (20425665899) and next prime (20425665901).

It is not an unprimeable number, because it can be changed into a prime (20425665901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1064794 + ... + 1083806.

It is an arithmetic number, because the mean of its divisors is an integer number (821081562).

Almost surely, 2^20425665900 is an apocalyptic number.

20425665900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20425665900 is an abundant number, since it is smaller than the sum of its proper divisors (38692206564).

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

20425665900 is a wasteful number, since it uses less digits than its factorization.

20425665900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22611 (or 22604 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 20425665900 in words is "twenty billion, four hundred twenty-five million, six hundred sixty-five thousand, nine hundred".