20536474 has 16 divisors (see below), whose sum is σ = 35265600. Its totient is φ = 8786304.

The previous prime is 20536471. The next prime is 20536513. The reversal of 20536474 is 47463502.

It is not an unprimeable number, because it can be changed into a prime (20536471) 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 7 ways as a sum of consecutive naturals, for example, 12217 + ... + 13795.

It is an arithmetic number, because the mean of its divisors is an integer number (2204100).

Almost surely, 2^20536474 is an apocalyptic number.

20536474 is a deficient number, since it is larger than the sum of its proper divisors (14729126).

20536474 is a wasteful number, since it uses less digits than its factorization.

20536474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2517.

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 20536474 is about 4531.7186585224. The cubic root of 20536474 is about 273.8474029098.

Adding to 20536474 its reverse (47463502), we get a palindrome (67999976).

The spelling of 20536474 in words is "twenty million, five hundred thirty-six thousand, four hundred seventy-four".