20393534 has 16 divisors (see below), whose sum is σ = 35404800. Its totient is φ = 8628984.

The previous prime is 20393521. The next prime is 20393579. The reversal of 20393534 is 43539302.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20393497 and 20393506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8114 + ... + 10325.

It is an arithmetic number, because the mean of its divisors is an integer number (2212800).

Almost surely, 2^20393534 is an apocalyptic number.

20393534 is a deficient number, since it is larger than the sum of its proper divisors (15011266).

20393534 is a wasteful number, since it uses less digits than its factorization.

20393534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18527.

The product of its (nonzero) digits is 9720, while the sum is 29.

The square root of 20393534 is about 4515.9200612943. The cubic root of 20393534 is about 273.2105698296.

The spelling of 20393534 in words is "twenty million, three hundred ninety-three thousand, five hundred thirty-four".