20454723 has 12 divisors (see below), whose sum is σ = 31283928. Its totient is φ = 12834240.

The previous prime is 20454691. The next prime is 20454739. The reversal of 20454723 is 32745402.

It is not a de Polignac number, because 20454723 - 2⁵ = 20454691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20454023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66693 + ... + 66998.

It is an arithmetic number, because the mean of its divisors is an integer number (2606994).

Almost surely, 2^20454723 is an apocalyptic number.

20454723 is a deficient number, since it is larger than the sum of its proper divisors (10829205).

20454723 is a wasteful number, since it uses less digits than its factorization.

20454723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133714 (or 133711 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 27.

The square root of 20454723 is about 4522.6897970124. The cubic root of 20454723 is about 273.4835450709.

The spelling of 20454723 in words is "twenty million, four hundred fifty-four thousand, seven hundred twenty-three".