20503253040 has 80 divisors (see below), whose sum is σ = 64430825568. Its totient is φ = 5392631808.

The previous prime is 20503253033. The next prime is 20503253059. The reversal of 20503253040 is 4035230502.

It is a tau number, because it is divible by the number of its divisors (80).

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

It is a self number, because there is not a number n which added to its sum of digits gives 20503253040.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 567619 + ... + 602658.

Almost surely, 2^20503253040 is an apocalyptic number.

20503253040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20503253040 is an abundant number, since it is smaller than the sum of its proper divisors (43927572528).

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

20503253040 is a wasteful number, since it uses less digits than its factorization.

20503253040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1170366 (or 1170360 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 24.

Adding to 20503253040 its reverse (4035230502), we get a palindrome (24538483542).

The spelling of 20503253040 in words is "twenty billion, five hundred three million, two hundred fifty-three thousand, forty".