20257982500 has 120 divisors (see below), whose sum is σ = 50754053504. Its totient is φ = 6928416000.

The previous prime is 20257982489. The next prime is 20257982519. The reversal of 20257982500 is 528975202.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 8521312 + ... + 8523688.

Almost surely, 2^20257982500 is an apocalyptic number.

20257982500 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 20257982500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25377026752).

20257982500 is an abundant number, since it is smaller than the sum of its proper divisors (30496071004).

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

20257982500 is a wasteful number, since it uses less digits than its factorization.

20257982500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2895 (or 2878 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 40.

The spelling of 20257982500 in words is "twenty billion, two hundred fifty-seven million, nine hundred eighty-two thousand, five hundred".