20474031 has 16 divisors (see below), whose sum is σ = 27795456. Its totient is φ = 13403616.

The previous prime is 20474023. The next prime is 20474053. The reversal of 20474031 is 13047402.

It is not a de Polignac number, because 20474031 - 2³ = 20474023 is a prime.

It is a super-2 number, since 2×20474031² = 838371890777922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20473989 and 20474007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20474011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53266 + ... + 53648.

It is an arithmetic number, because the mean of its divisors is an integer number (1737216).

Almost surely, 2^20474031 is an apocalyptic number.

20474031 is a deficient number, since it is larger than the sum of its proper divisors (7321425).

20474031 is a wasteful number, since it uses less digits than its factorization.

20474031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 20474031 is about 4524.8238639753. The cubic root of 20474031 is about 273.5695685563.

The spelling of 20474031 in words is "twenty million, four hundred seventy-four thousand, thirty-one".