20474793 has 6 divisors (see below), whose sum is σ = 29574714. Its totient is φ = 13649856.

The previous prime is 20474789. The next prime is 20474803. The reversal of 20474793 is 39747402.

It can be written as a sum of positive squares in only one way, i.e., 12873744 + 7601049 = 3588^2 + 2757^2 .

It is not a de Polignac number, because 20474793 - 2² = 20474789 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20474743) 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 5 ways as a sum of consecutive naturals, for example, 1137480 + ... + 1137497.

It is an arithmetic number, because the mean of its divisors is an integer number (4929119).

Almost surely, 2^20474793 is an apocalyptic number.

It is an amenable number.

20474793 is a deficient number, since it is larger than the sum of its proper divisors (9099921).

20474793 is a wasteful number, since it uses less digits than its factorization.

20474793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2274983 (or 2274980 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 20474793 is about 4524.9080653644. The cubic root of 20474793 is about 273.5729624072.

The spelling of 20474793 in words is "twenty million, four hundred seventy-four thousand, seven hundred ninety-three".