20403004 has 6 divisors (see below), whose sum is σ = 35705264. Its totient is φ = 10201500.

The previous prime is 20402981. The next prime is 20403007. The reversal of 20403004 is 40030402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20403007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2550372 + ... + 2550379.

Almost surely, 2^20403004 is an apocalyptic number.

It is an amenable number.

20403004 is a deficient number, since it is larger than the sum of its proper divisors (15302260).

20403004 is a wasteful number, since it uses less digits than its factorization.

20403004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5100755 (or 5100753 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 20403004 is about 4516.9684524026. The cubic root of 20403004 is about 273.2528529002.

Adding to 20403004 its reverse (40030402), we get a palindrome (60433406).

The spelling of 20403004 in words is "twenty million, four hundred three thousand, four".