20152344646 has 16 divisors (see below), whose sum is σ = 36579046176. Its totient is φ = 8128676736.

The previous prime is 20152344643. The next prime is 20152344679. The reversal of 20152344646 is 64644325102.

It is a super-2 number, since 2×20152344646² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20152344643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42336621 + ... + 42337096.

It is an arithmetic number, because the mean of its divisors is an integer number (2286190386).

Almost surely, 2^20152344646 is an apocalyptic number.

20152344646 is a deficient number, since it is larger than the sum of its proper divisors (16426701530).

20152344646 is a wasteful number, since it uses less digits than its factorization.

20152344646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84673743.

The product of its (nonzero) digits is 138240, while the sum is 37.

Adding to 20152344646 its reverse (64644325102), we get a palindrome (84796669748).

The spelling of 20152344646 in words is "twenty billion, one hundred fifty-two million, three hundred forty-four thousand, six hundred forty-six".