20451914945 has 16 divisors (see below), whose sum is σ = 30598190208. Its totient is φ = 12749245440.

The previous prime is 20451914897. The next prime is 20451915037. The reversal of 20451914945 is 54941915402.

It is not a de Polignac number, because 20451914945 - 2¹⁰ = 20451913921 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20451914896 and 20451914905.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26560544 + ... + 26561313.

It is an arithmetic number, because the mean of its divisors is an integer number (1912386888).

Almost surely, 2^20451914945 is an apocalyptic number.

It is an amenable number.

20451914945 is a deficient number, since it is larger than the sum of its proper divisors (10146275263).

20451914945 is a wasteful number, since it uses less digits than its factorization.

20451914945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53121880.

The product of its (nonzero) digits is 259200, while the sum is 44.

The spelling of 20451914945 in words is "twenty billion, four hundred fifty-one million, nine hundred fourteen thousand, nine hundred forty-five".