20533694 has 4 divisors (see below), whose sum is σ = 30800544. Its totient is φ = 10266846.

The previous prime is 20533693. The next prime is 20533703. The reversal of 20533694 is 49633502.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20533694.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20533693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5133422 + ... + 5133425.

It is an arithmetic number, because the mean of its divisors is an integer number (7700136).

Almost surely, 2^20533694 is an apocalyptic number.

20533694 is a deficient number, since it is larger than the sum of its proper divisors (10266850).

20533694 is a wasteful number, since it uses less digits than its factorization.

20533694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10266849.

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 20533694 is about 4531.4119212449. The cubic root of 20533694 is about 273.8350455445.

The spelling of 20533694 in words is "twenty million, five hundred thirty-three thousand, six hundred ninety-four".