20520402331024 has 40 divisors (see below), whose sum is σ = 39871989765440. Its totient is φ = 10230898492800.

The previous prime is 20520402330941. The next prime is 20520402331043. The reversal of 20520402331024 is 42013320402502.

It is a junction number, because it is equal to n+sod(n) for n = 20520402330983 and 20520402331001.

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, 6529789 + ... + 9147619.

It is an arithmetic number, because the mean of its divisors is an integer number (996799744136).

Almost surely, 2^{20520402331024} is an apocalyptic number.

It is an amenable number.

20520402331024 is a deficient number, since it is larger than the sum of its proper divisors (19351587434416).

20520402331024 is a wasteful number, since it uses less digits than its factorization.

20520402331024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2619239 (or 2619233 counting only the distinct ones).

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

Adding to 20520402331024 its reverse (42013320402502), we get a palindrome (62533722733526).

The spelling of 20520402331024 in words is "twenty trillion, five hundred twenty billion, four hundred two million, three hundred thirty-one thousand, twenty-four".