20464242040490 has 32 divisors (see below), whose sum is σ = 36941006672640. Its totient is φ = 8162295096384.

The previous prime is 20464242040457. The next prime is 20464242040511. The reversal of 20464242040490 is 9404024246402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10790879 + ... + 12544781.

It is an arithmetic number, because the mean of its divisors is an integer number (1154406458520).

Almost surely, 2^{20464242040490} is an apocalyptic number.

20464242040490 is a deficient number, since it is larger than the sum of its proper divisors (16476764632150).

20464242040490 is a wasteful number, since it uses less digits than its factorization.

20464242040490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1757246.

The product of its (nonzero) digits is 442368, while the sum is 41.

Adding to 20464242040490 its reverse (9404024246402), we get a palindrome (29868266286892).

The spelling of 20464242040490 in words is "twenty trillion, four hundred sixty-four billion, two hundred forty-two million, forty thousand, four hundred ninety".