20071004 has 12 divisors (see below), whose sum is σ = 35195328. Its totient is φ = 10015200.

The previous prime is 20070997. The next prime is 20071027. The reversal of 20071004 is 40017002.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20071004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2732 + ... + 6899.

It is an arithmetic number, because the mean of its divisors is an integer number (2932944).

Almost surely, 2^20071004 is an apocalyptic number.

It is an amenable number.

20071004 is a deficient number, since it is larger than the sum of its proper divisors (15124324).

20071004 is a wasteful number, since it uses less digits than its factorization.

20071004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10156 (or 10154 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 14.

The square root of 20071004 is about 4480.0674102071. The cubic root of 20071004 is about 271.7626064515.

Adding to 20071004 its reverse (40017002), we get a palindrome (60088006).

It can be divided in two parts, 2007 and 1004, that multiplied together give a triangular number (2015028 = T₂₀₀₇).

The spelling of 20071004 in words is "twenty million, seventy-one thousand, four".