20003402 has 4 divisors (see below), whose sum is σ = 30005106. Its totient is φ = 10001700.

The previous prime is 20003393. The next prime is 20003443. The reversal of 20003402 is 20430002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20430002 = 2 ⋅10215001.

It can be written as a sum of positive squares in only one way, i.e., 11703241 + 8300161 = 3421^2 + 2881^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5000849 + ... + 5000852.

Almost surely, 2^20003402 is an apocalyptic number.

20003402 is a deficient number, since it is larger than the sum of its proper divisors (10001704).

20003402 is a wasteful number, since it uses less digits than its factorization.

20003402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10001703.

The product of its (nonzero) digits is 48, while the sum is 11.

The square root of 20003402 is about 4472.5162939893. The cubic root of 20003402 is about 271.4571515348.

Adding to 20003402 its reverse (20430002), we get a palindrome (40433404).

The spelling of 20003402 in words is "twenty million, three thousand, four hundred two".