20451000346563 has 4 divisors (see below), whose sum is σ = 27268000462088. Its totient is φ = 13634000231040.

The previous prime is 20451000346559. The next prime is 20451000346729. The reversal of 20451000346563 is 36564300015402.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20451000346563 - 2² = 20451000346559 is a prime.

It is a super-2 number, since 2×20451000346563² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20451000346163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3408500057758 + ... + 3408500057763.

It is an arithmetic number, because the mean of its divisors is an integer number (6817000115522).

Almost surely, 2^{20451000346563} is an apocalyptic number.

20451000346563 is a deficient number, since it is larger than the sum of its proper divisors (6817000115525).

20451000346563 is an equidigital number, since it uses as much as digits as its factorization.

20451000346563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6817000115524.

The product of its (nonzero) digits is 259200, while the sum is 39.

The spelling of 20451000346563 in words is "twenty trillion, four hundred fifty-one billion, three hundred forty-six thousand, five hundred sixty-three".