20572500000 has 384 divisors, whose sum is σ = 73040438016. Its totient is φ = 5040000000.

The previous prime is 20572499977. The next prime is 20572500007. The reversal of 20572500000 is 527502.

It is a self number, because there is not a number n which added to its sum of digits gives 20572500000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20572500007) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 97499895 + ... + 97500105.

It is an arithmetic number, because the mean of its divisors is an integer number (190209474).

Almost surely, 2^20572500000 is an apocalyptic number.

20572500000 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 20572500000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36520219008).

20572500000 is an abundant number, since it is smaller than the sum of its proper divisors (52467938016).

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

20572500000 is an frugal number, since it uses more digits than its factorization.

20572500000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272 (or 234 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 21.

The spelling of 20572500000 in words is "twenty billion, five hundred seventy-two million, five hundred thousand".