20520100306 has 16 divisors (see below), whose sum is σ = 30996466200. Its totient is φ = 10187988480.

The previous prime is 20520100277. The next prime is 20520100327. The reversal of 20520100306 is 60300102502.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 9684331281 + 10835769025 = 98409^2 + 104095^2 .

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, 1146466 + ... + 1164226.

Almost surely, 2^20520100306 is an apocalyptic number.

20520100306 is a deficient number, since it is larger than the sum of its proper divisors (10476365894).

20520100306 is a wasteful number, since it uses less digits than its factorization.

20520100306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21789.

The product of its (nonzero) digits is 360, while the sum is 19.

Adding to 20520100306 its reverse (60300102502), we get a palindrome (80820202808).

The spelling of 20520100306 in words is "twenty billion, five hundred twenty million, one hundred thousand, three hundred six".