20203221510451 has 8 divisors (see below), whose sum is σ = 24093282795264. Its totient is φ = 16564131921480.

The previous prime is 20203221510403. The next prime is 20203221510463. The reversal of 20203221510451 is 15401512230202.

It is a happy number.

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

It is not a de Polignac number, because 20203221510451 - 2⁷ = 20203221510323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20203221510151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62742923785 + ... + 62742924106.

It is an arithmetic number, because the mean of its divisors is an integer number (3011660349408).

Almost surely, 2^{20203221510451} is an apocalyptic number.

20203221510451 is a deficient number, since it is larger than the sum of its proper divisors (3890061284813).

20203221510451 is a wasteful number, since it uses less digits than its factorization.

20203221510451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125485847921.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 20203221510451 its reverse (15401512230202), we get a palindrome (35604733740653).

The spelling of 20203221510451 in words is "twenty trillion, two hundred three billion, two hundred twenty-one million, five hundred ten thousand, four hundred fifty-one".