20451350220530 has 32 divisors (see below), whose sum is σ = 36900271362240. Its totient is φ = 8161038037440.

The previous prime is 20451350220421. The next prime is 20451350220551. The reversal of 20451350220530 is 3502205315402.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7881932 + ... + 10150248.

It is an arithmetic number, because the mean of its divisors is an integer number (1153133480070).

Almost surely, 2^{20451350220530} is an apocalyptic number.

20451350220530 is a deficient number, since it is larger than the sum of its proper divisors (16448921141710).

20451350220530 is a wasteful number, since it uses less digits than its factorization.

20451350220530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2270474.

The product of its (nonzero) digits is 36000, while the sum is 32.

Adding to 20451350220530 its reverse (3502205315402), we get a palindrome (23953555535932).

The spelling of 20451350220530 in words is "twenty trillion, four hundred fifty-one billion, three hundred fifty million, two hundred twenty thousand, five hundred thirty".