20251524240 has 240 divisors, whose sum is σ = 70037428032. Its totient is φ = 5241148416.

The previous prime is 20251524233. The next prime is 20251524259. The reversal of 20251524240 is 4242515202.

It is a tau number, because it is divible by the number of its divisors (240).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5044474 + ... + 5048486.

Almost surely, 2^20251524240 is an apocalyptic number.

20251524240 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 20251524240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35018714016).

20251524240 is an abundant number, since it is smaller than the sum of its proper divisors (49785903792).

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

20251524240 is a wasteful number, since it uses less digits than its factorization.

20251524240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4238 (or 4229 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The spelling of 20251524240 in words is "twenty billion, two hundred fifty-one million, five hundred twenty-four thousand, two hundred forty".