20524433140 has 24 divisors (see below), whose sum is σ = 43177082760. Its totient is φ = 8195340288.

The previous prime is 20524433093. The next prime is 20524433173. The reversal of 20524433140 is 4133442502.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 85155984 + 20439277156 = 9228^2 + 142966^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20524433099 and 20524433108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 890397 + ... + 913156.

It is an arithmetic number, because the mean of its divisors is an integer number (1799045115).

Almost surely, 2^20524433140 is an apocalyptic number.

20524433140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20524433140 is an abundant number, since it is smaller than the sum of its proper divisors (22652649620).

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

20524433140 is a wasteful number, since it uses less digits than its factorization.

20524433140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1804131 (or 1804129 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 28.

Adding to 20524433140 its reverse (4133442502), we get a palindrome (24657875642).

The spelling of 20524433140 in words is "twenty billion, five hundred twenty-four million, four hundred thirty-three thousand, one hundred forty".