20523014440 has 16 divisors (see below), whose sum is σ = 46176782580. Its totient is φ = 8209205760.

The previous prime is 20523014429. The next prime is 20523014441. The reversal of 20523014440 is 4441032502.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19366062244 + 1156952196 = 139162^2 + 34014^2 .

It is not an unprimeable number, because it can be changed into a prime (20523014441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256537641 + ... + 256537720.

Almost surely, 2^20523014440 is an apocalyptic number.

20523014440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20523014440 is an abundant number, since it is smaller than the sum of its proper divisors (25653768140).

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

20523014440 is a wasteful number, since it uses less digits than its factorization.

20523014440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513075372 (or 513075368 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 20523014440 its reverse (4441032502), we get a palindrome (24964046942).

The spelling of 20523014440 in words is "twenty billion, five hundred twenty-three million, fourteen thousand, four hundred forty".