20503513002 has 16 divisors (see below), whose sum is σ = 46865172672. Its totient is φ = 5858146560.

The previous prime is 20503512977. The next prime is 20503513007. The reversal of 20503513002 is 20031530502.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 20503513002.

It is not an unprimeable number, because it can be changed into a prime (20503513007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244089399 + ... + 244089482.

It is an arithmetic number, because the mean of its divisors is an integer number (2929073292).

Almost surely, 2^20503513002 is an apocalyptic number.

20503513002 is an abundant number, since it is smaller than the sum of its proper divisors (26361659670).

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

20503513002 is a wasteful number, since it uses less digits than its factorization.

20503513002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488178893.

The product of its (nonzero) digits is 900, while the sum is 21.

The spelling of 20503513002 in words is "twenty billion, five hundred three million, five hundred thirteen thousand, two".