20257215000 has 240 divisors, whose sum is σ = 69565825560. Its totient is φ = 4910400000.

The previous prime is 20257214983. The next prime is 20257215001. The reversal of 20257215000 is 51275202.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20257215001) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 1809420 + ... + 1820580.

Almost surely, 2^20257215000 is an apocalyptic number.

20257215000 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 20257215000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34782912780).

20257215000 is an abundant number, since it is smaller than the sum of its proper divisors (49308610560).

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

20257215000 is a wasteful number, since it uses less digits than its factorization.

20257215000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11212 (or 11182 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 24.

The spelling of 20257215000 in words is "twenty billion, two hundred fifty-seven million, two hundred fifteen thousand".