20394402 has 32 divisors (see below), whose sum is σ = 46810752. Its totient is φ = 5802624.

The previous prime is 20394401. The next prime is 20394443. The reversal of 20394402 is 20449302.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20394401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10758 + ... + 12510.

It is an arithmetic number, because the mean of its divisors is an integer number (1462836).

Almost surely, 2^20394402 is an apocalyptic number.

20394402 is an abundant number, since it is smaller than the sum of its proper divisors (26416350).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20394402 is a wasteful number, since it uses less digits than its factorization.

20394402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2042.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 20394402 is about 4516.0161647186. The cubic root of 20394402 is about 273.2144459505.

It can be divided in two parts, 2039 and 4402, that added together give a triangular number (6441 = T₁₁₃).

The spelling of 20394402 in words is "twenty million, three hundred ninety-four thousand, four hundred two".