20525215012500 has 288 divisors, whose sum is σ = 65402986190976. Its totient is φ = 4968216000000.

The previous prime is 20525215012459. The next prime is 20525215012513. The reversal of 20525215012500 is 521051252502.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 272624862 + ... + 272700138.

It is an arithmetic number, because the mean of its divisors is an integer number (227093702052).

Almost surely, 2^{20525215012500} is an apocalyptic number.

20525215012500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20525215012500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32701493095488).

20525215012500 is an abundant number, since it is smaller than the sum of its proper divisors (44877771178476).

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

20525215012500 is a wasteful number, since it uses less digits than its factorization.

20525215012500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75981 (or 75959 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 30.

The spelling of 20525215012500 in words is "twenty trillion, five hundred twenty-five billion, two hundred fifteen million, twelve thousand, five hundred".