20520541002 has 16 divisors (see below), whose sum is σ = 44198088480. Its totient is φ = 6314012592.

The previous prime is 20520540979. The next prime is 20520541021. The reversal of 20520541002 is 20014502502.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20520541002.

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, 131541852 + ... + 131542007.

It is an arithmetic number, because the mean of its divisors is an integer number (2762380530).

Almost surely, 2^20520541002 is an apocalyptic number.

20520541002 is an abundant number, since it is smaller than the sum of its proper divisors (23677547478).

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

20520541002 is a wasteful number, since it uses less digits than its factorization.

20520541002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263083877.

The product of its (nonzero) digits is 800, while the sum is 21.

The spelling of 20520541002 in words is "twenty billion, five hundred twenty million, five hundred forty-one thousand, two".