20403484745 has 16 divisors (see below), whose sum is σ = 29627918208. Its totient is φ = 13167962880.

The previous prime is 20403484679. The next prime is 20403484747. The reversal of 20403484745 is 54748430402.

It is not a de Polignac number, because 20403484745 - 2²⁶ = 20336375881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20403484747) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17145191 + ... + 17146380.

It is an arithmetic number, because the mean of its divisors is an integer number (1851744888).

Almost surely, 2^20403484745 is an apocalyptic number.

It is an amenable number.

20403484745 is a deficient number, since it is larger than the sum of its proper divisors (9224433463).

20403484745 is a wasteful number, since it uses less digits than its factorization.

20403484745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34291600.

The product of its (nonzero) digits is 430080, while the sum is 41.

The spelling of 20403484745 in words is "twenty billion, four hundred three million, four hundred eighty-four thousand, seven hundred forty-five".