20344453450402 has 8 divisors (see below), whose sum is σ = 32311779009516. Its totient is φ = 9573860447232.

The previous prime is 20344453450393. The next prime is 20344453450463. The reversal of 20344453450402 is 20405435444302.

It can be written as a sum of positive squares in 2 ways, for example, as 20340090980001 + 4362470401 = 4509999^2 + 66049^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×20344453450402³ (a number of 41 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 299183138943 + ... + 299183139010.

Almost surely, 2^{20344453450402} is an apocalyptic number.

20344453450402 is a deficient number, since it is larger than the sum of its proper divisors (11967325559114).

20344453450402 is a wasteful number, since it uses less digits than its factorization.

20344453450402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598366277972.

The product of its (nonzero) digits is 921600, while the sum is 40.

Adding to 20344453450402 its reverse (20405435444302), we get a palindrome (40749888894704).

The spelling of 20344453450402 in words is "twenty trillion, three hundred forty-four billion, four hundred fifty-three million, four hundred fifty thousand, four hundred two".