20402596 has 6 divisors (see below), whose sum is σ = 35704550. Its totient is φ = 10201296.

The previous prime is 20402593. The next prime is 20402617. The reversal of 20402596 is 69520402.

It can be written as a sum of positive squares in only one way, i.e., 17388900 + 3013696 = 4170^2 + 1736^2 .

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 as a sum of consecutive naturals, namely, 2550321 + ... + 2550328.

Almost surely, 2^20402596 is an apocalyptic number.

It is an amenable number.

20402596 is a deficient number, since it is larger than the sum of its proper divisors (15301954).

20402596 is a wasteful number, since it uses less digits than its factorization.

20402596 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5100653 (or 5100651 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 20402596 is about 4516.9232891427. The cubic root of 20402596 is about 273.2510314706.

Adding to 20402596 its reverse (69520402), we get a palindrome (89922998).

The spelling of 20402596 in words is "twenty million, four hundred two thousand, five hundred ninety-six".