20420673 has 32 divisors (see below), whose sum is σ = 33825792. Its totient is φ = 10670400.

The previous prime is 20420651. The next prime is 20420681. The reversal of 20420673 is 37602402.

It is not a de Polignac number, because 20420673 - 2¹³ = 20412481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20420773) 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 31 ways as a sum of consecutive naturals, for example, 35478 + ... + 36048.

It is an arithmetic number, because the mean of its divisors is an integer number (1057056).

Almost surely, 2^20420673 is an apocalyptic number.

It is an amenable number.

20420673 is a deficient number, since it is larger than the sum of its proper divisors (13405119).

20420673 is a wasteful number, since it uses less digits than its factorization.

20420673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725.

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 20420673 is about 4518.9238763228. The cubic root of 20420673 is about 273.3317091251.

The spelling of 20420673 in words is "twenty million, four hundred twenty thousand, six hundred seventy-three".