20102440306 has 32 divisors (see below), whose sum is σ = 34195170240. Its totient is φ = 8786418624.

The previous prime is 20102440283. The next prime is 20102440307. The reversal of 20102440306 is 60304420102.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20102440307) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1680061 + ... + 1691983.

It is an arithmetic number, because the mean of its divisors is an integer number (1068599070).

Almost surely, 2^20102440306 is an apocalyptic number.

20102440306 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20102440306 is a deficient number, since it is larger than the sum of its proper divisors (14092729934).

20102440306 is a wasteful number, since it uses less digits than its factorization.

20102440306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15370.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 20102440306 its reverse (60304420102), we get a palindrome (80406860408).

The spelling of 20102440306 in words is "twenty billion, one hundred two million, four hundred forty thousand, three hundred six".