20351152240 has 40 divisors (see below), whose sum is σ = 47337996960. Its totient is φ = 8136750336.

The previous prime is 20351152223. The next prime is 20351152243. The reversal of 20351152240 is 4225115302.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20351152243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122101 + ... + 235819.

It is an arithmetic number, because the mean of its divisors is an integer number (1183449924).

Almost surely, 2^20351152240 is an apocalyptic number.

20351152240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20351152240 is an abundant number, since it is smaller than the sum of its proper divisors (26986844720).

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

20351152240 is a wasteful number, since it uses less digits than its factorization.

20351152240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115969 (or 115963 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 20351152240 its reverse (4225115302), we get a palindrome (24576267542).

The spelling of 20351152240 in words is "twenty billion, three hundred fifty-one million, one hundred fifty-two thousand, two hundred forty".