20859694 has 4 divisors (see below), whose sum is σ = 31289544. Its totient is φ = 10429846.

The previous prime is 20859691. The next prime is 20859719. The reversal of 20859694 is 49695802.

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 20859694.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20859691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5214922 + ... + 5214925.

It is an arithmetic number, because the mean of its divisors is an integer number (7822386).

Almost surely, 2^20859694 is an apocalyptic number.

20859694 is a deficient number, since it is larger than the sum of its proper divisors (10429850).

20859694 is a wasteful number, since it uses less digits than its factorization.

20859694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10429849.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 20859694 is about 4567.2413993569. The cubic root of 20859694 is about 275.2766098319.

The spelling of 20859694 in words is "twenty million, eight hundred fifty-nine thousand, six hundred ninety-four".