2001242240520 has 64 divisors (see below), whose sum is σ = 6003929589120. Its totient is φ = 533646564864.

The previous prime is 2001242240513. The next prime is 2001242240527. The reversal of 2001242240520 is 250422421002.

It is an interprime number because it is at equal distance from previous prime (2001242240513) and next prime (2001242240527).

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

It is not an unprimeable number, because it can be changed into a prime (2001242240527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3494349 + ... + 4026531.

It is an arithmetic number, because the mean of its divisors is an integer number (93811399830).

Almost surely, 2^{2001242240520} is an apocalyptic number.

2001242240520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001242240520 is an abundant number, since it is smaller than the sum of its proper divisors (4002687348600).

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

2001242240520 is a wasteful number, since it uses less digits than its factorization.

2001242240520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563534 (or 563530 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 24.

Adding to 2001242240520 its reverse (250422421002), we get a palindrome (2251664661522).

The spelling of 2001242240520 in words is "two trillion, one billion, two hundred forty-two million, two hundred forty thousand, five hundred twenty".