20402594 has 8 divisors (see below), whose sum is σ = 30632448. Its totient is φ = 10191780.

The previous prime is 20402593. The next prime is 20402617. The reversal of 20402594 is 49520402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20402593) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1682 + ... + 6605.

It is an arithmetic number, because the mean of its divisors is an integer number (3829056).

Almost surely, 2^20402594 is an apocalyptic number.

20402594 is a deficient number, since it is larger than the sum of its proper divisors (10229854).

20402594 is a wasteful number, since it uses less digits than its factorization.

20402594 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9520.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 20402594 is about 4516.9230677531. The cubic root of 20402594 is about 273.2510225420.

Adding to 20402594 its reverse (49520402), we get a palindrome (69922996).

The spelling of 20402594 in words is "twenty million, four hundred two thousand, five hundred ninety-four".